Write an equation to describe the variation. Use k for the constant of proportionality.
-$x$ varies jointly as $y$ and $z$.
A) $x = k y z$
B) $x = k + y + z$
C) $x y z = k$
D) $x + y + z = k$

Question

Quizplus · Accepted Answer

Joint variation means that $x$ is directly proportional to both $y$ and $z$ simultaneously, which is correctly represented by the equation $x = kyz$.

Write an Equation to Describe the Variation xxx Varies Jointly As yyy

Write an Equation to Describe the Variation $x$ Varies Jointly As $y$