Question

What is the y-intercept of the line? y = -3x
A. -3
B. 0
C. 1
D. 3

Answer 1

y=mx+b where b is the y-intercept, in this case the b=0 so the y-intercept would be B. 0

Answer 2

just think about where x is 0, there is where you will find the y intercept.

Try to imagine the graph in your head, you look at the x axis and see where the graph hits 0 on it, there is your y intercept.