Guys quickly. i'm offering 15points (more than its worth) and brainliest answer.

When you use the equation     y=mx+b
y=y
m= slope
x = x
b= your y intercept

So you plug in your number and when you have done that you should have y=3x+-2

And then when you graph them on a coordinate plane you use RISE over RUN

Rise equals your y axis
Run equals your x axis, 

So you start at the orgin, and go up 3 and then over -2. 

Hope that helped

It is 7 because it is the absolute value