Write an equation to describe the variation. Use k for the constant of proportionality.
-$\mathrm { s }$ varies directly as $\mathrm { t }$ and inversely as the square of $\mathrm { u }$.
A) $\mathrm { s } = \frac { \mathrm { ku } ^ { 2 } } { \mathrm { t } }$
B) $s = \frac { k t } { u ^ { 2 } }$
C) $\operatorname { stu } ^ { 2 } = \mathrm { k }$
D) $\mathrm { s } + \mathrm { t } - \mathrm { u } ^ { 2 } = \mathrm { k }$

Question

Quizplus · Accepted Answer

Direct variation with $t$ means $s$ increases as $t$ increases, and inverse variation with $u^2$ means $s$ decreases as $u^2$ increases. The correct equation is $s = \frac { k t } { u ^ { 2 } }$.

Write an Equation to Describe the Variation s\mathrm { s }s

Write an Equation to Describe the Variation $\mathrm { s }$