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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

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.