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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1answer
11 views

Updating a real time plot in Matlab

I have a stream of incoming data from a device and I want to plot it in real time. The plot has to take in the new data coming in and constantly update the plot. Any idea how to approach this?
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2answers
25 views

How do you shift a sigmoidal curve to the right?

How do you shift the function $1$ $/ ( 1 + e ^ {-x} )$ to the right without altering the shape of the curve?
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0answers
9 views

Franck and Hertz graph function

I need a function whom graph is the following (the Franck and Hertz experiment graph): Currently I wrote the following function: ...
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4answers
33 views

Equation of a line

I've been practising some past previous exam question and came across this: How would you find the equation of the line with y-intercept? -$\frac{3}{4}$ and slope -$\frac{1}{2}$?
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1answer
19 views

How does one interpret, geometrically, $\frac{dx}{dt}>0$, $\frac{dx}{dt}<0$ and $\frac{dy}{dt}>0$, $\frac{dy}{dt}<0$?

I'm specifically referring to this example from my lecture notes: I understand, algebraically, what's going on, but what does the fact that, for example, $\frac{dx}{dt}>0$ and ...
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2answers
17 views

Finding the Asymptote / Root of a reciprocal function

$$y = \frac{3}{8x - 3} $$ The y-intercept is $-1$ and the vertical asymptote is $x = \frac{3}{8}$ but what would be the horizontal asymptote and the x-intercept in this case? I am asking this as the ...
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1answer
14 views

2 Linear equation problems [on hold]

Write objective, constraints and graph for the following two problems: 1.A test offers 2 types of problems. Type A takes 3 Min to solve and B takes 2. You have 20 min to take the test and can only ...
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1answer
19 views

Functions (Finding Inverse)

$f(x) = x^2 + 2x$ , domain ${x ≥ 1}$ Question: find the inverse The inverse is $f(x) = 1 + \sqrt(1+x)$ (taking the positive square root only) As $f^{-1}(5) = 2$ and as 2 is an element from the ...
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1answer
12 views

Functions inverse + domain

Question part a): !([http://imgur.com/sKJbFKu]) Answer: !http://imgur.com/jRfeXkW Can anyone explain why the inverse must be the negative square root?
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0answers
22 views

How can I visualize the following region

surface $z = xy$ inside the cylinder $x^2 + y^2 = 1$ I took level curves for $z=xy$ when $z=-2, z=-1, z=0, z=1, z=2$, and I got two parallel lines $y=0,x=0$, when $z=0$, and various hyperbolas for ...
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3answers
38 views

Functions definition + question

Am I correct in saying that for Functions, the below is the correct definition: For each value of x in the domain there is only one value of y in the range. Hence, the picture below means that it is ...
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1answer
35 views

Four Square and Eight Promblem

Please help-this problem is pretty difficult for me for some reason.
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1answer
39 views

How to find the number of solutions of $3^x + 4^x + 5 ^x = 6^x$

My try: I tried plotting the graph(manually) of LHS and RHS but it does not give any information whether they will intersect or not.If they will intersect then there will be 1 solution and if they do ...
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2answers
23 views

Symmetry of product of symmetric functions

Let's say we have three functions, $f(x), g(x) \text{ and }h(x)=f(x)\cdot g(x)$, all of which are defined for $x \in [-1,1]$. If $f(x) \text{ and }g(x)$ are symmetric around the y-axis, will $h(x)$ ...
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1answer
25 views

Partial derivatives and functions equal to 0

If I have the function (family of curves) $$F(x,y,p)=(px)^2+p=0$$ I am under the impression that $$\frac{\partial F(x,y,p)}{\partial p}=2px^2+1$$ Is not always equal to $0$. Please could you ...
0
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1answer
12 views

Comparing two quantities

So I have two agents that have strategies, each of which are specified via one parameter. For agent1 its p and agent2 its q. Each of these agents produce a payoff p1 and p2, which depend on the ...
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1answer
35 views

Equation of a nasty graph

Let $f(x)$ be a real valued diffrentiable function in its domain. Let $PQ$ be a line which is inclined at an angle of $k$ with the tangent of the graph $f(x)$ at $x_0$. The rate of change of the ...
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0answers
14 views

Locus of a moving point

Let $f(x),g(x)$ be Differentiable functions in their respective domains. Let $m(x)$ be a function whose perpendicular distance from $f(x)$ is always $g(x)$.Then, whats the equation of $m(x)$ in terms ...
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1answer
17 views

Question about graph of sin function

There is question I had on my mind for 3-4 years. If you have a function:- f(x) = (sin(x))^n If you increase the value of n slowly the Value of the function at all points, except where it is one, will ...
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1answer
29 views

Can somebody help me graph this equation. Having troubles. [closed]

Graph this equation 6x ≤ 4 - 9y in a system of inequalities.
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0answers
12 views

Reflecting function over a line

I need to derive a function that is the reflection of the function $y=(0.0056x)/(1+0.006x)$ across the line $y=(1-z)x/1000$ where $z$ is just a pre-determined variable. Thanks so much!!
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1answer
21 views

how to define a function which returns a multiset

Given graph $G(V,E)$, how can I formally define function $f\prime$ which takes a node $v \in V$ and returns a multiset?
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4answers
54 views

Manipulating $\sin^2(x)$ to fit a specific shape.

I'm trying to draw a figure using Latex/Tikz, and the best way for me to do this is to define a function mathematically and draw it. The function I have so far that best fits the picture is ...
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1answer
56 views

Sketch the Graph. $S(x) = \frac{1}{2} (x-1)^3 +4$

The question is: Sketch the graph of the the function by transforming the graph of an appropriate function of the form $y = x^n$. Indicate all x and y intercepts on the graph. I am really trying to ...
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2answers
36 views

how do i write an equation in standard form by completing the square for $x^2 -9y^2-4x-18y=14$

I'm really having trouble with completeing squares i can solve for circles and ellipses but i can't seem to understand hyperbolas or parabolas, help would be deeply appreciated.
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1answer
44 views

The continuity of a function at a point x0

Choose correct options , more than one may be correct . (1) $$ \textrm{The function defined by } \begin{cases} f(x)=\cos\left(\dfrac{1}{x}\right) & x\neq 0\\ f(0)=0 & \\ \end{cases} ...
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0answers
18 views

Isolines and tangent fields

If an isocline on a tangent field has the same gradent as the solution curve does this mean that this lines as alsways an asymptope.
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2answers
33 views

How to sketch a function such as r(t) = (t^2)i + (t^3)j

How can I sketch this function by hand? I am not even sure what I should be expecting,.
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2answers
18 views

How do I find the inverse of this exponential function?

$x=-3(3^{-x})+9$ I know the steps up until a certain point. $x=-3(3^{-y})+9$ $x-9=-3(3^{-y})$ $\frac{(x-9)}{-3} = 3^y$ $ln (\frac{x-9}{-3}) = -y * ln 3$ Not sure what to do from here. I know I ...
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0answers
25 views

Function plotting

I have a function $f(x)=\binom{N}{K} \ln(1-F(x)), x \geq 0$, where $F(x)$ is a cumulative distribution function. Then, $\ln(1-F(x))$ is negative for various values of $x$ as $F(x) \geq 0$. Also, ...
2
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1answer
38 views

How to draw stick trefoil knot

http://commons.wikimedia.org/wiki/File:Stick_number_trefoil.png I am interested in plotting the stick trefoil knot. I don't know where to start. I am looking for equations or co-ordinates of ...
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0answers
24 views

Semi-implifit finite difference solution of a 2-d shallow water equation [closed]

I need help with writing the discrete form of the PDEs below. V= 1/n R^(2/3) √(S ) Q= 1/n AR^(2/3) √(S ) ...
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0answers
20 views

area of surface Function for Champagne flute

Can any body tell me how to solve number 5 on this page i have attached, finding a function for champagne flute while function for wine glass is given.
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1answer
16 views

Graphing Elliptic Cylinders

Given a question to graph: x^2 + 4y^2 = 16 I would assume its a 2D Plot. My textbook assumes otherwise and treats it as a trace. This is how the equation looks like when plotted. x^2 + ...
1
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1answer
48 views

What does “versus” mean in the context of a graph?

Say you have a graph of say $y=mx+b$, with $x$ on the horizontal axis and $y$ on the vertical axis. You need to give the graph a title, would you say: This is a graph of "$y$ versus $x$?" or This ...
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0answers
72 views

Physical shapes you can't simulate using mathematical functions

This question borders philosophy, so I would be happy to move it somewhere else if this forum is inappropriate. While doing some 3D function plotting, it occurred to me that I can plot any shape ...
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0answers
14 views

Weighting values using curves

I am in the field of computer programming but I think my question is maths based. I have tried several google searches on this matter but nothing has come up with what I am looking for, probably ...
0
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1answer
21 views

Seeing complex roots on the graph of a polynomial

When I sketch the graph for a general second degree polynomial $y = ax^2 + bx + c$ it is easy to "see" its roots by looking at the points where $y=0$. This is true also for any $n$-degree polynomial. ...
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0answers
14 views

A sequence made from a function under a certain rule.

I have been working on this question . My attemt at this question so far: $(a)$ From the diagrams I figured out the pattern to be as follows $x_{0},f(x_{0}),f(f(x_{0})),....$ wherin $x_{0}=x_{0}$ ...
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0answers
13 views

Detect Regions Described By Lines in Rectangular Coordinates

Need some help from the superior math minds here. This problem is part of a software project. Essentially, I have a Cartesian grid. The user can create lines by plotting points (every 2 points ...
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0answers
8 views

point projection into yx rotated plane

I want to simulate depth in a 2D space, If I have a point P1 I suppose that I need to project that given point P1 into a plane x axis rotated "theta" rads clockwise, to get P1' It seems that P1'.x ...
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2answers
52 views

Curve Fitting a Cyclical Pattern of Data

I'm analyzing phonological characteristics of the 22 letters used in the Hebrew alphabet, and assigned each letter an enumeration to see if they are organized based on place of articulation: ...
3
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2answers
38 views

How to intuitivly think of graphing a function in $\Bbb{R}^3$

How to intuitivly think of graphing a function in $\mathbb R^3$? Let there be $f: \mathbb R \rightarrow \mathbb R^3$ $$f(t)=\begin{bmatrix} \cos(t) \\ \sin(t) \\ t \\ ...
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1answer
20 views

Sketching Logs with Quadratic Terms

$\log(x^2+1) = y$ asymptote at $x^2+1 > 0$ and so there is no asymptote $x$ and $y$ intercept at $(0,0)$ How do you know that the function goes both directions, and has a dip in the middle? ...
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2answers
39 views

Maximum of linear combination

I have an range like this: $$x + 2y \leq 40$$ $$4x + 3y \leq 120$$ $$x \geq 0, y \geq 0 $$ I made an plot using wolfram alpha. Now I have a linear combination $$4x+5y$$ and I want to find the maximum ...
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1answer
31 views

How to draw a circular 3D plot in matlab

I want to plot this function in matlab : sin(4*x)*cos(4*y) on a disk This is how i proceeded : syms x y; f=@(x,y) sin(4*x)*cos(4*y); ezmesh(f,'circ') This method works with f=@(x,y) ...
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1answer
42 views

find this graph thing is very hard

Graph the solutions of the following equations. For each graph, determine if the graph represents a function of x. Explain your answer. (a)$\frac{y}{|y|}=\frac{x}{|x|}$ (b)$⌊x⌋⌊y⌋ = 1$ need some ...
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2answers
78 views

what does the e mean in $2.392537302040576$e$+16$?

Please help me, I need to understand how to do this math skill. Thank you. I assure you that it is important.
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1answer
30 views

What is the area of the closed curve?

The graph of the polar graph $r=\dfrac{4}{2-\cos\theta}$ forms a closed curve. Find the area of the region inside the curve.
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0answers
22 views

How does sin & cos affect audio waves

Given a function such as "cos (x) + 4 sin (3x) + 5 cos (3x)" when graphing it to produce a wave, are there any set rules to how you can adjust the function to produce a higher frequency, or increased ...