Answer:
y = 4x + 5
Step-by-step explanation:
As we move from the point (-3, -7) to the point (1, 9), x increases by 4 and y increases by 16. Thus, the slope of the desired line is m = rise / run = 16/4 = 4.
The slope-intercept form is y = mx + b. We must find b.
Here, m = 4, x = 1 and y = 9:
9 = 4(1) + b, so b = 5, and the desired equation is thus
y = 4x + 5
