Question 160009
You first need to determine the slope of the line m 
This is equal to m=y2-y1/x2-x1 rise/run  -9-(-6)/-7-(-2)=-3/-5  3/5

y=3/5x+b

Plug in one of the points to determine b=constant

-9=3/5(-7)+b

b=-24/5

The equation is y=3/5X-24/5
To double check the answer plug in the x and y values of the second point

-6=-2(3/5)-24/5