What is the y-coordinate of the y-intercept of the line that passes through the points (–4, –4) and (4, 8)?

Answer 1

Note that, on this problem, you don't have to find the equation of the line.

As the two points are equal distances from the y-axis, the y-intercept is the average of the y co-ordinates at either point: (-4 + 8)/2 = 4/2 = 2.