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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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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29 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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28 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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3answers
103 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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31 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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104 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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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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21 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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41 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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32 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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30 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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36 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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72 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
41 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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54 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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167 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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26 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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43 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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67 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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62 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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37 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 ...
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128 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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64 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 ...
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74 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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21 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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22 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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31 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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32 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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32 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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37 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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29 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
25 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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37 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 ...
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29 views

Position n circles in circular layout

Given an index from 1 ... n, and a fixed width and height of each circle (and a fixed spacing), how would I calculate the center x coordinate and center y coordinate of each node to match the ...
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86 views

Limit of a function containing square root.

Q. $\lim _{x\to 0}\frac{\left(\sqrt{1-cos2x}\right)}{x}$ We can write this function as $\lim _{x\to 0}\frac{\left(\sqrt{2sin^2x}\right)}{x}$. Algebraically we have ...
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Graphing ratios; non-common denominators for different data series in the same category?

I'm developing custom graphing software for a client and they have a need that doesn't make sense to me mathematically and I was hoping someone could help. They will be graphing the ratio of scrapped ...
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82 views

The sketch of $y=\tan^{-1} \left ( \frac{1}{x} \right )$

For this function, the horizontal asymptotes are easy enough to find. However, I have issue with the point $x=0$. Graphing calculators say that there is a vertical line connecting $y=\frac{\pi}{2}$ ...
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139 views

Log arithmic Equation - Graph curved line

I'm recreating the graph picture below with equations. Using the online graphing tool "Desmos": These are all the equations I have done so far, with there restrictions top stop at specific points. ...
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139 views

Graphing picture equations - Curve Lines

I'm basically trying to recreate the graph picture below. Using a online graphing tool "Desmos": I managed to create the equations for the straight lines and circles for the sunset picture. ...
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105 views

Equations to create this Graph Picture

I'm using a online graphing tool "Desmos" to create the image bellow (sunset). I created the 3 circles to form the sun. Using these equations: However, I am stuck on creating the images for the ...
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62 views

Implicit 3d plot with depending bounds

I would like to plot this plane ($k1,k2,k3$ are constants): $x-k1=0$ such as $x=k1..n$ ; $y=(z-k3+k2)..n $; $z=k3..n$ The difficulty is that second variable y depend on z. I was trying to use Maple ...
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30 views

Contour plot of a parabolic cylinder?

Consider the following function: My book says this is its contour plot: I don't understand why. I would have expected the lines to get closer together as you get closer to the X-Axis, yet they ...
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26 views

Does a graph of this type have a name?

Does a graph of this type have a name? When I say a "graph of this type" I mean where the scales on the axes aren't uniform all the way along.
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38 views

Sketching a curve and finding where the parameter increases

(a) Eliminate the parameter to find a Cartesian equation of the curve. (b) Sketch the curve and indicate with an arrow the direction in which the curve is traced as the parameter increases. $$x = ...
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23 views

How to label a tenth of a second properly in a graph?

I'm making a graph for a science class, and the x-axis represents every tenth of a second. What's the best way of labeling that axis other than "time (one tenth of a second)", or is that the best way? ...
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96 views

How to find the equation of the graph reflected about a line?

Consider the graph of $y = e^x$ (a) Find the equation of the graph that results from reflecting about the line $y = 4$. (b) Find the equation of the graph that results from reflecting ...
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142 views

Utility function, plotting indifference curves

I know how to plot indifference curves; simply take the utility function and plot some level curves in $2D$. But how to plot a specific indifference curve, so all bundles on it are indifferent to a ...
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61 views

Function - Main Features?

I understand how to draw this function, but what does it mean by main features? any examples for the question below? Consider the function $f : \mathbb{R} \rightarrow \mathbb{R}$ given by $f(x) = ...
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24 views

What is the equation of these coordinate points

(2,2) (3,6) (4,24) (5,120) (6,720) (7,5040) I input all of these points into my calculator and ran every working equation none of which fits the equation. These equations include: ...
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35 views

help understanding how to graph a function

I am having trouble figuring out how to graph this function. A(t) = 35e-0.17t When I attempted to graph it my calculator did not display anything and I am not sure how to graph it by hand.