Write an equation to describe the variation. Use k for the constant of proportionality.
-q varies jointly as $r$ and the cube of $s$.
A) $q = k + r + s ^ { 3 }$
B) $\mathrm { qrs } ^ { 3 } = \mathrm { k }$
C) $\mathrm { q } + \mathrm { r } + \mathrm { s } ^ { 3 } = \mathrm { k }$
D) $q = k r s ^ { 3 }$

Question

Quizplus · Accepted Answer

Joint variation means that q varies directly with multiple variables. In this case, q varies directly with r and the cube of s, which is correctly represented by the equation $q = k r s ^ { 3 }$.

Write an Equation to Describe the Variation rrr And the Cube Of

Write an Equation to Describe the Variation $r$ And the Cube Of