Question

Line passes through (-10,-4) (-1,2) what is the y intercept?

Answer 1

First find the slope of the line.

Answer 2

use y2 - y1 / x2 - x1
The y1 means the y number in the first point. Which is (-10,-4) The y2 is talking about the y number in the second point which is (-1,2)
So, in the end, you will be doing:
2 - (-4) / (-1) - (-10)