If the point $(-2,4)$ is on a line with slope $\frac{1}{2}$, then the $y$-intercept of this line is
(A) 5
(B) -4
(C) 3
(D) 0
(E) 8
Since the line has slope $\frac{1}{2}$, then for every 2 units we move to the right, the line rises by 1 unit. Therefore, $(-2+2,4+1)=(0,5)$ lies on the line. Thus the $y$-intercept is 5 .