# Tagged Questions

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

37 views

### What type of function is $x^2+y^2+6x$?

So, the task is to calculate the volume of body formed when the surface bounded by these functions: $y=x^2/3$ and $x^2+y^2+6x$ rotates around $x$ axis. Everything involving the actual calculation ...
12 views

31 views

17 views

### finding the equation of a graph with 2 given characteristics

I need to find the equation for the graph of $y = x^2$ with the following characteristics 1. congruent to $4x^2 + 8$ 2. shares the same translations as $\frac{1}{3x - 9}$ I have attempted this ...
104 views

25 views

### How to restrict this inequality only to where it is true for all x < y?

While doing some research in game theory modeling, I've come across the following inequality: $$\frac{x - \epsilon(1+a)}{a} \leq y \leq \frac{x + \epsilon(1+a)}{a}$$ Where $x$ and $y$ are some ...
91 views

### Is there a site to draw a curve and get the equivalent equation?

I know there are many sites where we can input the equation and get the curve of the function (examples here, here and here). What I want is the inverse: I have an idea of how I want the curve to be, ...
32 views

### When graphing both X, and Y are fractions

In my instructions, I am told to place the point on the coordinate system. My X, and Y value are $$(\frac 52, \frac 72)$$ at this point I am a little lost. Would I flip it, and multiply it like so? ...
47 views

### How to graph a Quadratic equation.

I have an equation that goes: $0.0001x^2 - 0.22x + 197$. I'm not asking for the answer, but instead, how can I graph it without dealing with these insanely tough numbers.
23 views

25 views

### match limit of different paths on a graph

$\lim_{(x,y)\rightarrow 0}\frac{xy^2}{x^2+y^4}$ if we consider the path $x=y^2$ and get $\lim_{(y^2,y)\rightarrow 0}\frac{y^2(y^2)}{(y^2)^2+y^4}=\lim_{y\rightarrow 0}\frac{y^4}{2y^4}=\frac{1}{2}$ ...
45 views

### Matlab 3D plots

I am currently in high school and is writing a maths research paper on a calculus problem. In the conclusion, I would like to include a 3D plot of a function I found. It goes something like this: a, ...
61 views

### Heap tree to Pennant forest

First time poster. I'm having trouble identifying the way to represent a heap tree as a pennant forest, I understand that each pennant is a subtree of the heap but When i looked at an example i simply ...
46 views

### Find a sine function that intersects at ($y = 0$) for a given $x$

If (for say, visual aesthetics) I would like to plot the graph of a sine wave on a 2D graph that intersects the $x$ axis with value of $y =0$ when $x$ is some arbitrary integer - how would I go about ...
24 views

### Pressure-Temperature water diagram phase function

I'm trying to find a analytical expression that describes the pressure-temperature function. The function that I want to describe is the pressure-temperature function where the water is in liquid ...
I know that to graph $\arcsin x$, I need to only take into account its principal values, that is its image is restricted to $[-\frac{\pi}{2},\frac{\pi}{2}]$. Same with $\arccos x$, its image is ...