What is the y coordinate of the y−intercept of the line that passes through the points
(−4, −1) and (4, 5)?

Question

What is the y coordinate of the y−intercept of the line that passes through the points
(−4, −1) and (4, 5)?

anonymous · Answer

Basically, Put it into slope-intercept form.
y = mx + b where m is the slope and b is the y-intercept.
First find the slope.
5 + 1/4 + 4 = 6/8 = 3/4
Plug it in for m.
y = 3/4x + b
Now plug in one of the points in for x and y to solve for b.
-1 = 3/4(-4) + b
-1 = -3 + b
b = 2
y = 3/4x + 2
Since 2, is the y-intercept, 2 or (0, 2) is the answer. :)

anonymous · Answer

Thanks soo much! I get really confused on these types of questions!

anonymous · Answer

You're welcome ^_^