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
36 views

What is the graph of $y = \sin n$ and why is it different from the graph of $y = \sin x$?

I have downloaded a book about Calculus from MIT OCW. In that book, there is a section "A Thousand points of Light". (You can download the relevant section from here.) In that section, it is written ...
-1
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0answers
18 views

Tikz: how to plot arcsec and arccos? [migrated]

It is easy to plot arctan and arccot, but got inverse sec and csc functions, It seems difficult. Can anyone do it?
1
vote
1answer
25 views

Could not find equation of function from data

I have a problem to find equation of function of my data: 0.00 0.007 0.20 0.041 0.40 0.165 0.60 0.449 0.80 0.816 1.00 0.982 1.20 0.741 1.40 0.212 1.60 -0.362 1.80 ...
0
votes
1answer
20 views

Rewrite the following surface so that I can graph it.

$z = \dfrac{1+x^2}{1+y^2}$ $ $ I want the part of the surface above the square $|x|+|y|\leq 1$ $ $ OR we can write this square as $-y<x<y$ and $-1<x<-1$ $ $ I have spent hours trying ...
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0answers
33 views

Function's graph sketch

$f(x) = x+9$ $g(x) = 2x-3$ I need to draw the sketch of $\min(f,g)$ and $\max(f,g)$. I tried: http://sketchtoy.com/62375984 The yellow is the min and the blue is max. The lines should be ...
3
votes
1answer
38 views

Sketching a surface

I'm trying to draw a sketch to get a feel of the situation but am confused as to what the question is asking. I have sketched $y^2=8x$ in the plane $z=0$ and marked on the points where $y$ and $z$ ...
1
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1answer
41 views

Software to easily draw 3d plots from functions

my problem is that I need a way to quickly check results of my, that is to say, homework. I think that the best way to do this is to draw a plot of a function to quickly see whether my solution is ...
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0answers
26 views

Can not determine scale of x-axis of attached graph

I am trying to digitize the data from the graph in this link. I thought the $x$-axis was in $\log_{10}$ scale but after trying to digitize this way the points seemed off. I also tried digitizing in ...
2
votes
1answer
44 views

Why does this graph only the positive side

The following equation graphs a love heart, $x^2+(y- \sqrt[3]{x^2})^2=1$ And since (please correct me if I'm wrong) $\sqrt[3]{x^2}=x^{2/3}$ I should be able to write it like this: $x^2+(y- ...
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2answers
54 views

Which set of points are defined by the relation $x/|x|=y/|y|$?

Which set of points are defined by the relation $x/|x|=y/|y|$? I think the answer is a straight line bisecting the first and third quadrants through the origin ( ie the line x=y). However wolfram ...
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1answer
25 views

parameterize the following functions [closed]

Help determining the parameterized solution of the following functions $$a) { \left( x-2 \right) }^{ 2 }+{ \left( y-1 \right) }^{ 2 }=4\quad if\quad 1\le y\le 3$$ $$b) \frac { { \left( x+3 \right) ...
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vote
2answers
54 views

Graph a function

I have a question, I have a function: $$f(x) = \frac{-x^2-10x}{2}$$ I'm really confused how to replace the x. So, what would be the points in $y$ if $x$ were: $-4, -3, -2, -1, 0, 1, 2, 3, 4$?
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0answers
31 views

Exercise about vector functions of real variable

Parametrize in a clockwise direction by means of a continuous vector function into pieces, starting at the point $(1,1)$ the following curve. (Sorry for my bad English) $$c:\begin{cases} { \left( ...
2
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2answers
30 views

Establish the absolute maximum of a function

We have this function:$$f(x)=\begin{cases} \sin(x) \cdot\ln(\sin2x), & \mbox{if }0<x<\pi/2 \\ 0, & \mbox{if }x=0,\mbox{or }x=\pi/2 \end{cases}$$ So, how to prove that it decreases and ...
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3answers
53 views

sketching the graph

how to sketch the graph $|x+y|= m$, when $ m $ is some real number? I personally can not see any efficient or known method to do so...
0
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1answer
24 views

How to draw the graph of $|x|+|y|=1+x$ and $y+|y|=x+|x|$.

There is this question that asks to draw the graph of $|x|+|y|=1+x$ and $y+|y|=x+|x|$. I know how to draw the graph of $y=\ldots$ using elementary techniques of translating, dilating, etc. But this ...
1
vote
1answer
21 views

Question regarding Bezier Curve

A Bezier curve $Q$ has control points $P_0 = (0,0,0), P_1 = (0,1,0), P_2 = (1,1,0) and P_3 = (2,0,0)$. What point is $Q(\frac12)$?
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1answer
36 views

By looking at a graph of a function, how do I find the maxima/minima of its curvature function. [closed]

All Ideas are appreciated. I could think of some intuitive ideas, but could not back them by solid clean reasoning. thanks, I will post If i find anything
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0answers
23 views

Quartic Polynomial Manipulation

I have a quartic polynomial in $x$ (too long to write here) $f(x,c_1, c_2, c_2)$ where $c_1, c_2, c_3$ are constants which I have complete freedom over how to fix their values, as long as they are ...
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2answers
45 views

Parametric Equations

$x=3\sin^3t$ $y=3\cos^3t$ How would I even begin to work out this one? I'm supposed to graph it, but I have no clue what how to even start it.
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0answers
13 views

need for a function suggestion to fit data

I have calculated some data which looks like the figure below, I was used to use spline to fit the data but I noticed that the data form looks rather similar to zeta and 11/r functions so I was ...
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votes
4answers
41 views

Increasing, continuous, concave downward function normalised between 0.5 and 1

What would be a good function which is increasing, continuous, concave downward with $$\lim_{x \to 0} f(x) = 0.5$$ and $$\lim_{x \to \infty} f(x) = 1.$$ It should be concave downward whose ...
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3answers
30 views

Graphing polynomial functions

I am having problems understanding how to graph $(x^2 -1)(x^2 -9)$, Any help would be much appreciated! Thanks
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1answer
23 views

Velocity time graph and determining the time taken

The velocity of a particle and time are as follows $40ms^-1 in 1 sec$, $30ms^-1 in 2 sec$, $20ms^-1 in 3 sec$, $10ms^-1 in 4 sec$. How to calculate the time taken to trave $35m$ for the velocity-time ...
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0answers
60 views

Sketching the shock path

I can do the vast majority of this question except the bit underlined in green at the bottom. I don't really understand what it is asking. By 'some large t' does it mean 'at large values of t'. To get ...
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votes
1answer
37 views

Why does $f(x) = x \cos 4x$ lie below the $x$-axis in ther interval $[\pi/4, \pi/3]$?

How can I explain why function $f(x)$ lies below the $x$-axis in the interval $\left[\dfrac{\pi} 4, \dfrac{\pi} 3\right]$ where $f(x) = x \cos 4x$?
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1answer
22 views

Graphing functions

I am having problems understanding how to graph the product $fg$ when $f(x) = x$ and $g(x) = |x|$. Any help would be much appreciated!
1
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1answer
15 views

Plotting the intersection of multiple surfaces with WolframAlpha

I want to plot the intersection of two surfaces like in this post. But if I enter the much simplified expression ContourPlot3D[{x^2 + y^2 + z^2 - 4=0, xy=1}, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}] ...
0
votes
1answer
20 views

Find a projectivity to create a graph.

I have the tetrahedron {xyzt=0} in projective space with homogeneous coordinate (x,y,z,t). I need to create a graph but the tetrahedron in affine coordinate is {xyz=0} and I can't visualize the ...
1
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1answer
23 views

How to figure out a graphs function

I'm trying to figure out how to time an animation in CSS, and all I have to work with is this image with some graph-plots of the animation-speed. I did have some calculus 10 years ago, but the ...
0
votes
1answer
9 views

Making y the subject of equation while maintaining the domain?

Because I am plotting the curve on a graphing calculator, I have to change the subject of the following equation to y. x=0.07(y+3)^2-4.7 I got: y=((x+4.7)/0.07)^0.5-3 But now the line is ...
0
votes
1answer
100 views

How does one graph $\sum_{x=0}^{n}$ [closed]

How does one graph a summation, like $$\sum_{x=0}^{n} n$$ Can it be like this Because if you take the points from the summation (0,0), (1,1), (2,3), (3,6) you can tell by summations it only works ...
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0answers
14 views

Get a set of points from Fourier plot on Matlab?

I have a program that collects raw data and also does a Fourier transform to get complex numbers. When I feed the raw data into Matlab to do its own FFT, I can get a nice plot of power on frequency. ...
0
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1answer
25 views

What's the graph for this periodic function

Please show the graph for $-2\pi <t<4\pi$ $$f(t)=e^{-t}$$ $$f(t)=f(t\pm2\pi)$$ Is there an online plotter for periodic functions?
2
votes
2answers
49 views

SAT math question regarding slope [closed]

In the xy-plane, the graph of $y=k(x-1)^2$, where $k$ is a constant, passes through the point $(3,10)$. What is the value of $k$?
0
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4answers
82 views

Length of a curve without function?

I need to find the length of this curve: I don't have a function but I do have 3 sets of coordinates: $(0, 51)$, $(337, 674)$, and $(1022, 1022)$ The $(337, 674)$ set refers to the tangent and ...
1
vote
2answers
66 views

Can someone suggest a function to achieve this graph?

I need a function that achieves a curved, logarithmic (I think) graph. The graph plots the level progression of a player of a simple game over time. Some players might progress faster, others slower, ...
0
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0answers
18 views

A simple plot of a list in R

This is a very easy question, I guess. But unfortunately I struggle to solve it in an easy way: I have a list in R. I would like to plot the entries of each column vertically and label the x-axis to ...
1
vote
1answer
38 views

How to draw the graphs for these functions?

Could I please be helped with the graphs for the following functions: $$y=\lceil \tan x \rceil, \quad y=\tan (\lceil x \rceil), \quad y=\lceil \tan (\lceil x \rceil) \rceil$$ I have been able to ...
0
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1answer
31 views

How to normalize a slope?

Say I have two slopes and two averages for a sample: $m=4{,}000$ dollars/day, average $a=50{,}000$ $n=80{,}000$ dollars/day, average $b=700{,}000$ Graphically, $n$ is very ‘steep’ compared to $m$. ...
0
votes
1answer
42 views

How to identify the function of a graph?

I am trying to identify the function of a graph in order to create a dataset for it. Dataset as in several x/y-values that will lead Excel/PowerPoint to create a graph looking just like the drawing: ...
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0answers
41 views

How do you call a scale that starts at $∞$, has $1/n$ divisions and tends to $0$?

A linear scale $2n$ divisions: 0 2 4 6 8 Logarithmic scales $10^n$ divisions: 1 10 100 1000 10000 ...
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1answer
45 views

How to derive the answer for this puzzle problem visually?

I was looking at this problem on Puzzle StackExchange about working out the proportion of sand in two separate beakers. Rather than providing a mathematical explanation, I thought it would be easiest ...
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0answers
14 views

Calculating line segment coords between 2 rectangles

I'm working on a program that renders 2D objects on a Cartesian plane. In this one example I have 2 rectangles A and B, the top left coords of A and B are known as well as the length and breadth. I ...
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3answers
34 views

Graphing rational functions

Graph the rational function $f(x)=\frac{-4}{-x-2}$ Please help me figure out how to start this problem.
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2answers
37 views

Graphing functions on a graph

Need help solving this problem step by step!
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1answer
47 views

Graph all vertical and horizontal asymptotes [closed]

Graph all vertical and horizontal asymptotes of the function $$f(x)=\frac{-10x-11}{-4x-2}.$$ Please help me figure out how to start this problem.
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0answers
12 views

Mathematical/graphical implications of representing double integral of changing acceleration (which gives displacement) on a 3d plane.

Lets assume a function a = |sin t| for acceleration over time. If we integrate it, we get instantaneous velocity. I have been told that integrating a function provides me with the area under the ...
0
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1answer
30 views

Integrating function of acceleration to obtain displacement

Lets assume a function a = |sin t| for acceleration over time. If we integrate it, we get instantaneous velocity. Now i have taken a limit for time. How will this graph look like? I have been told ...
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0answers
29 views

What type of equation matches these data points?

Can anyone tell me what equation will match these data points? 377, 384, 1113, 1120, 19861, 19868 Wolfram Plot