Find an equation of variation in which the following are true.
-$y$ varies directly as the square of $x$, and $y = 2.4$ when $x = 4$.
A) $y = 0.15 x ^ { 2 }$
B) $y = 1.72 x ^ { 2 }$
C) $y = 0.2 x ^ { 2 }$
D) $y = 0.19 \sqrt { x }$

Question

Quizplus · Accepted Answer

The equation of variation where $y$ varies directly as the square of $x$ is $y = kx^2$. Substituting $y = 2.4$ and $x = 4$ gives $2.4 = k(4)^2$, solving for $k$ gives $k = 0.15$, so the equation is $y = 0.15x^2$.

Find an Equation of Variation in Which the Following Are yyy

Find an Equation of Variation in Which the Following Are $y$