Question

@geerky42 http://prntscr.com/77dzgo

Answer 1

y=mx+b is slope intercept form.
Here your equation is -1/2 x + 3

B is the y-intercept. The point (0,B) for the line.
So you need a line that has (0,3) for a point.

Then look at your slope. -1/2

The top value is your y change. The bottom value is you x change.
That means that for each new point the line will have a -1 y change, and a +2 x change.

If you start at (0,3) you would go to the next point of:
(0-1, 3+2).

What do you think your answer is now? Can this help you figure it out?