what is the y-intercept of the line that passes through the points(2,-1)and(-3,9)

Answer 1

(9--1)/(-3-2) = 10/-5 =-2

y=mx+b

y=-2x+b, plug in either point to calculate b = y intercept

-1=-2(2) + b

b =-1+4 = 3 = y intercept

3 is the y intercept, or in point form, the y intercept is (0,3) the y intercept as a point always has an x coordinate of zero