Questions regarding the plotting or graphing of functions. Questions about graphs with vertices and edges should use the (graph-theory) tag instead. (STUB)

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Finding the set of values of y for which there are no points on a curve

A curve has the equation: $$y=2x-5+ \frac{18}{x+4}$$ Find the set of values of $y$ for which there are no point on the curve. What I did: Found the maximum and minimum points: ...
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0answers
20 views

Polar coordinates of hyperbola

What is the sum of the vertices of the equation of $xy=8$? This is a tilted hyperbole and using polar coordinates could solve it I believe
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1answer
16 views

Prove concavity without testing the second derivative..

Consider a function $F(L)=(L-L^2a)T^{L-1}$, where $0<L<\frac{1}{a}$. The constants $a$ and $T$ may take values over $]0,1[$ and $[0.01,0.1]$, respectively. The first derivative of $F$: ...
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0answers
20 views

I can't plot this function (y = (8*(1-exp^(-800000000*x))) on Scilab. Error 144 [on hold]

I'm a beginner using Scilab, so probably it is a stupid question. Also, I don't know how to change Scilab console messages to English, I'm sorry about that. Here is my code: function [y] = f(x) y ...
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1answer
28 views

The best way to graph a lot of data

I have a lot of feature vectors in the form of: v1=[x0, x1, x2, x3, x4] where x0, x1, and x2 can take binary values. either 0 or 1 x3 and x4 can take values from 0 up to 9 I have a lot of vectors ...
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1answer
19 views

How do I get an Archimedean spiral that decreases from an initial radius?

So, where the equation of an archimedean spiral is: $$r = a + b\theta$$ I want to be able to use the equation in this form to then have a function where r decreases in exactly the same way by an ...
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0answers
35 views

Changing graph $f(x)$ and $g(x)$ [on hold]

The graph of $f(x)=x^2$ is changed to create the graph of $g(x)=-9x^2$. a) The maximum value of $g(x)$ is equal to the minimum value of $f(x)$. b) The maximum value of $g(x)$ is less than the minimum ...
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0answers
6 views

MR Function Question

I have a question about MR Function below: P = 1/Q^2 + 3Q + 1 Find the MR Function and Evaluate it at Q = 4 Are you guys able to elaborate? I've never done these types of questions before, am i ...
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0answers
22 views

Help with understanding how to sketch a graph of y=1/f(x) and y = xf(x)

I'm having problems trying to figure out how to sketch a graph for these 2 questions. Could someone provide me a step by step guide on how to do this? Thanks in advance.
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0answers
7 views

What are some planes (spaces) akin to the trace-determinant plane in other disciplines?

When studying basic differential equations, I found the trace-determinant plane incredibly illuminating. Similarly, I find it very helpful to see different kinds of conics as slices of a cone. What ...
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6answers
66 views

Domain of $\frac{1}{\frac{1}{x}}$

Let $f(x)=\frac{1}{x}$, then we have $f^{-1}(x)=\frac{1}{x}$. So $f(f^{-1})=\frac{1}{\frac{1}{x}}=x$. My question is, what is the domain of $f(f^{-1})(x)$? is it everything? or everything but zero? ...
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0answers
9 views

Find the point where the greater growth rate surpasses the lesser one without graphing

I have 2 lines: f(x) = 2010x^2 + 1388x and g(x) = x^3 What's the strategy for finding a x1 >= 0 where g(x) becomes greater than f(x) for all x >= x1? If one DNE, how would I know?
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1answer
14 views

How to plot median with 10% and 90% percentiles

I have to make a plot of same data (I do it in Matlab). On the x-axis the time (in seconds) and on the y-axis the response time (in ms). Now I have to do it with "Median with 10% and 90% ...
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1answer
18 views

Finding the max with velocity and acceleration graph

I'm confused on why there is a maximum at R. If I flipped the acceleration graph it looks like a continuously increasing function with no max or min to me. Could someone help me understand this? 8a ...
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1answer
46 views
+50

Sketching Region of Joint p.d.f. of X and Y — Homework Help

How can I sketch the joint p.d.f. of X and Y? $f(x,y)=(\frac{1}{3}$ if $1<x<3$ and $0<y<1$ ; $\frac{1}{6}$ if $6<x<8$ and $0<y<1$ ; $0$ otherwise) After this is graphed, find ...
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1answer
11 views

Analyze the graph of a derivative

I have the graph of the derivative of some function: And i need to know: a) The critic values of f. b) The X coordinate of each of points where theres an relative extrema of f. c) An interval of ...
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2answers
25 views

Calculating Formula from Plot Points

Ok, so it's been a very long time since I've done anything like this. I've got a big table of data to enable you to look up a certain $X$ value (bodyweight) and get a $Y$ value (co-efficient for ...
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0answers
26 views

How to sketch the graph of $y=6-4\cos(x/2 )$?

How can I sketch a graph such as $y=6-4\cos(x/2 )$? Should we stretch the graph horizontally with a scale factor of $2$, translate the graph by $6$ units in the positive $y$-direction and the graph ...
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2answers
62 views

Plot the graph of a discontinuous function of two variables using Maple

I want to plot the level curve of $xyz = 1$; According to wolfram alpha the plot should look like this; But instead I end up with; Here's my Maple code. I'm sure it's because the function is ...
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2answers
27 views

Find a line that is perpendicular from x=10 and one point, (4,5)

The title is quite self-explainary ;) I know that the answer is $y=5$, but I am not sure how does one person come to that conclusions showing all the steps. Can you please help me here?
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1answer
35 views

How can I plot a 2D figure in MATLAB by “connecting the dots”?

I'm an amateur at MATLAB and I know how to do the basic stuff such as plotting functions, writing M files, functions, for loops, etc but I've be tasked to do something I have never done before. I ...
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1answer
28 views

How do you call this kind of functions in english?

I have a couple of formulas that I would like to plot, but I can't find the much needed documentation for them because I don't know how to correctly name them in english . This formulas assume that ...
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1answer
20 views

How to plot bivariate function involving modulus and floor functions?

I need to plot: $\displaystyle\large|||x|-2|-1|+|||y|-2|-1|=1$ $\displaystyle\large\left\lfloor\frac{|3x+4y|}{5}\right\rfloor+\left\lfloor\frac{|4x-3y|}{5}\right\rfloor=3$ either for finding area ...
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2answers
35 views

Graph of $\arcsin(\cos(x))$

How to draw graph of $\arcsin(\cos(x))$ or even $\arcsin(\sin(x))$ without use of graphing calculator , its sort of confusing me from long time. It gives pointed curves when drawing from calculator , ...
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0answers
30 views

How to plot this function

How to plot this function in WolframAlpha or some other graphing calculator? $f(x) =\left\{\begin{matrix} 1 & -\dfrac{-2\pi}{3} \leq x \leq \dfrac{2\pi}{3}\\ -1 & ...
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1answer
28 views

How can I determine the range of the graph $\arccos(1/x^2)$

EDIT: All that is required for me to understand how to graph the function, is how to determine its range As the title implies, I am unsure of how to graph $\arccos(1/x^2)$. So far, I have found ...
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0answers
27 views

How to draw the graph of mod x-mod y = p?

I need to understand how to draw the graph of mod x -mod y = p. Plotting graphs of functions involving more than one absolute function always poses problems for me. Descriptive help would be ...
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2answers
34 views

Is there a function whose graph is contained in one quadrant of the coordinate plane?

Is there a function whose graph is contained in one quadrant of the coordinate plane? It should be related to maths and not physics. Please give me the equation and if possible its picture.
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0answers
42 views

Math software for plotting phase portraits

I'm looking for math software which is possible to plot phase portraits for ODE and systems of differential equations. Is there a software which can create not only simple 2D phase portrait plots but ...
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2answers
26 views

Finding missing coordinates in a non-linear graph?

If I have the y value for the x values of 1, 2, 3, 7, and 9 in a graph, but I need all 1 through 12, how would I figure out the missing points? ...
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1answer
48 views

Graph a curve over time

I have not taken a math class outside statistics since about 2001… I know that for some people this will be easy but for me it lives just outside my ability. I am working on a program to control ...
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0answers
41 views

Sketch a graph of a function that satisfies all of the following condition.

From (a) means x=-1 , x=1 (b) the graph below x axis when -1 < x < 1 the graph above x axis when x<-1 and x>1 (c) where (-1,4) & (1,0) (d) negative slope when x<0, ...
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0answers
21 views

Finding the formula of a curve

Is it possible to find the simple formula for curves? For example, you want to plot the letter "A" , is it possible to find a formula to graph letter "A" on the coordinate system? To the best of my ...
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2answers
36 views

Investigation: For what values of $k$ does $y=k\sqrt{x^2-1}$ intersect $y=\ln x$

I'm doing a bit of investigating to try to see where two curves intersect. More specifically, I want to see for what values of $k$ does $y=k\sqrt{x^2-1}$ intersect $y= \ln x$ When you draw the two ...
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1answer
16 views

Domain of function when open circles are included in graph

how would I write the domain of this function? Would I ignore the part of the graph with the open circles like this? $\{x \ \ / \ -4 \leq x \leq -2 \text{ or } 1 \leq x \leq 4\}$
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3answers
38 views

Why do polynomial terms with an even exponent bounce off the x-axis?

Like if it's $f(x) = (x-5)^2(x+6)$ Why, at $x=5$, does the graph reflect off the x-axis?
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0answers
35 views

$3D$ surfaces multivariable Calculus

A surface is constructed as follows: First a curve $(0, y, −((y − 1)^2)((y + 1)^2))$ is drawn in the yz–plane. Then a parabola $(u, u^2)$ is drawn in the uv–plane. Finally, in each plane y = b, a copy ...
2
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3answers
115 views

How to plot $r^2 = 36\cos(2\phi)$ in Cartesian coordinates?

How would I plot $r^2 = 36\cos(2\phi)$ in $x$ and $y$ coordinate system? I know that $r^2 = x^2 + y^2$, and I know that $x = r\cos(\phi)$ and $y = r\sin(\phi)$. However I'm not sure how to proceed. ...
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2answers
56 views

Why isn't $f(x)=\sqrt{2-x}$ reflected across the y-axis?

If I try to graph this function, it does not appear to reflect across the y-axis when it comes time to do the reflection. Rather, it is reflected around the point where the function begins on the ...
3
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2answers
68 views

What does it mean for a point to be “inside” a plane curve?

Suppose that we have a simple closed curve in the $xy$-plane: $f(x,y)=0$ (for example, $f(x,y) = x^2 + y^2 - 4$. If I give you the point $(x,y)$, is there an analytical method to determine whether ...
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1answer
17 views

Graph the function and apply the appropriate transformations $y = (1)/( x + 4)$

Graph the function and apply the appropriate transformations $y = 1/( x + 4) $ I know this much. My denominator can not be zero, thus $x+4 \neq 0$ which gives me $x > -4 $; in interval ...
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1answer
19 views

Plotting a Transcendental Function

How would I plot $m_{2}$ as a function of $m_{1}$ for $0.5< m_{1} < 10$, for the following equation: $$\frac{\sin(m_{2})}{(m_{1}+m_{2})^{2}} = \alpha,$$ where $\alpha$ is a non-zero constant? ...
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1answer
29 views

Similarity of two plot to each other

I want get the similarity of two different plot by Percent ... I have many plots for comparison like below : y : ...
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0answers
29 views

Recognize a shape with a set of Data points

So I have a number of points on graph. For Ex: (1,1) (2,5) ......... and so on. And I want to recognize which shape is it closest to from circle, triangle and rectangle. -By closest I mean ...
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31 views

A rectification, what is the graph of the following?

What is the graph of y=y(x) of: $\sqrt {{{(x - 2)}^2} + {y^2}} + \sqrt {{{(x + 2)}^2} + {y^2}} + \sqrt {{x^2} + {{(y + 2)}^2}} = 16$ Thank very much
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4answers
26 views

How to sketch the graph of an implicit in two dimentional space xy?

I am looking for a software able to sketch the graph of $y = y(x),$ where: ${e^y} + y{e^y} + {e^{ - y}} = 4 - 2\cos x$ your help is highly appreciated, thank you.
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2answers
37 views

What is the area of the region enclosed by the graph [closed]

I really dont know how i have to solve that. It looks easy but I dont really know. can someone give me a hint
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0answers
24 views

Density of points on graph

I have a scatter graph with points placed on it like: I am trying to find an equation that gives me the density of the points on the graph, for example the points on this graph: are closer ...
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1answer
19 views

How can I calculate a polynomial trend line where `y` always increases as `x` increases?

Assume the following given coordinates: [0,0],[12,200],[24,2000]. The following equation generates a second order polynomial trend line (at least that's what excel ...
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1answer
22 views

Finding the vertical shift of a sinusoidal function

I'm currently studying sinusoids, I've been given a graph with a few key points and have been told to find a cosine function which fits it. When it comes to finding the vertical shift of the graph the ...