i need help with graphing (f)x = 3x+2

thank you

Printable View

- June 21st 2007, 07:03 PMlizard4graph help
i need help with graphing (f)x = 3x+2

thank you - June 21st 2007, 07:18 PMJhevon

This is just a line with slope = 3 and y-intercept = 2

To draw a line, all we need are two points, the intercepts are always good points to use.

For x-intercept, set

So our x-intercept is

For y-intercept, we simply have the lone constant as the intercept. So our y-intercept is at , which is the point

But why is this? Let's see.

For y-intercept, set

So the y-intercept is

Now just plot these points on a graph and draw a straight line through them, as you see below