Question 652533
This is in form y = mx + b where:
m is slope (aka: speed)
b is y-intercept (aka: where the graph hits the y-axis)

In your equation y = -3/4x, m = -3/4.  There is no b.  When this happens, put a point at (0,0) because this is where grpahs woth no b start.

-3/4 is read "down 3 and to the right(+) 4"

So, starting at (0,0), go down 3 spaces. Don't put a dot yet!
From down three, go over (to the right) 4 spaces.  Put another dot!

Connect your dots.  You're done!