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| Math Central | Quandaries & Queries |
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Question from Desiree, a student: i don't understand how to answer this 'w varies jointly with the square of u and the cube of d' |
Hi Desiree,
If you know that $w$ varies with the square of $u$ it means that there is a constant $c$ so that
\[w = c \; u^2\]
If $w$ varies jointly with the square of $u$ and the cube of $v$ it means that there is a constant $k$ so that
\[w = k \; c^2 v^3\]
Penny
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