### Basic Graphing

For some reason, I can't log into Were-Here today. So, I'm replying to a question here.

I've seen this come up before, and while the answer is simple, it can trip people up...especially if they haven't done a lot of graphing in Math or Science.

Let's say we want to draw a curve, based on an equation. How do we get the * x*,

*values to draw the curve with?*

**y**We evaluate the function at certain values of * x*.

You may see the equation presented in this format: **f(x) = 2x - y**

To graph this equation, we'll need to rewrite it so that one side has **y**, all by itself:

**y = 2x**

Now we decide on a range of values for x, and solve for y at each point:

**x=1
y=2(1) = 2**

giving us the (x,y) coordinate of (1,2)

**x=2
y=2(2) = 4**

giving us the (x,y) coordinate of (2,4)

**x=3
y=2(3) = 6**

giving us the (x,y) coordinate of (3,6)

and so on, until we have all the points we want.

Then we plot these points on a graph, connect the dots, and we're done.