Nathan B. answered 05/12/15
Tutor
5
(20)
Elementary and Algebraic skilled
Just like before, we need to find the slope via rise over run:
(-7 - -1) / (-1 - 11)
-6 / -12 → 1/2
So the slope is 1/2
Now, we could use the point-slope formula to find the y-intercept, but honestly, we have one point already near: (-1,-7).
-7 + 1/2 = -6 1/2
So the y-intercept is 6 1/2.
Put the two parts into the s-I formula, and you will have your final answer.