If y varies directly as the square of x, and x is doubled, how is y changed?
A) y is half as large as before
B) y is one-quarter as large as before
C) y is twice as large as before
D) y is four times as large as before

Question

Quizplus · Accepted Answer

Since y varies directly as the square of x, when x is doubled, y becomes (2x)^2 = 4x^2, which is four times the original y (since the original relationship was y = x^2).

If Y Varies Directly as the Square of X, and X