When Graphing a Curve, the Vertical Intercept Is

When graphing a curve, the vertical intercept is:
A.the value of the y-variable when the value of the x-variable is equal to zero.
B.the change in the y-variable between two points divided by the change in the
x-variable between those same two points.
C.the value of the y-variable when the value of the slope is equal to zero.
D.the value of the x-variable when the value of the y-variable is equal to zero.