Solve.
-Suppose that $y$ varies directly as the square of $x$. If $x$ is halved, what is the effect on $y$ ?
A) It's squared.
B) It's multiplied by $\frac { 1 } { 2 }$.
C) It's multiplied by $\frac { 1 } { 4 }$.
D) It's multiplied by $\frac { 1 } { 8 }$.

Question

Quizplus · Accepted Answer

If $y$ varies directly as the square of $x$, then $y = kx^2$ for some constant $k$. Halving $x$ gives $y = k(\frac{x}{2})^2 = k\frac{x^2}{4}$, which means $y$ is multiplied by $\frac{1}{4}$.

Solve -Suppose That yyy Varies Directly as the Square Of xxx If

Solve
-Suppose That $y$ Varies Directly as the Square Of $x$ If