Write an equation to describe the variation. Use k for the constant of proportionality.
-$P$ varies jointly as $R$ and the square of $S$.
A) $P + R + S ^ { 2 } = k$
B) $\mathrm { PRS } ^ { 2 } = \mathrm { k }$
C) $P = k R S ^ { 2 }$
D) $P = k + R + S ^ { 2 }$

Question

Quizplus · Accepted Answer

Joint variation means that $P$ is directly proportional to both $R$ and $S^2$, which is correctly represented by $P = kRS^2$.

Write an Equation to Describe the Variation PPP Varies Jointly As RRR

Write an Equation to Describe the Variation $P$ Varies Jointly As $R$