Answer:
Explanation:
We can use the intercept form of the equation of a line, then solve for y.
Intercept form
 x/(x-intercept) +y/(y-intercept) = 1
 x/-4 +y/8 = 1
__
Solving for y, we have ...
 -2x +y = 8 . . . . multiply by 8
 y = 2x +8 . . . . add 2x
The coefficient of x is 2, so the slope is 2.
__
The graph shows you the rise is 8 for a run of 4, so ...
 slope = rise/run = 8/4
 slope = 2