R-7=7 add the seven from both sides, leaving the r alone, because this is what you are trying to find. Thus the answer is r=14.
Given:
The points are (-3, 2) and (2, -13).
To find:
Slope-intercept form of the equation.
Solution:
Here
.
Slope of the line:



m = -3
Using point-slope formula:




Add 2 on both sides.


Slope-intercept form of the equation is y = -3x - 7.