Question

What type of variation is the following?

z = kxy²
Select one:
a. Direct
b. None of these
c. Joint
d. Inverse​

Answer 1

Joint variation

Here

`\\ \rm\Rrightarrow z=kxy^2`

• Remove k

`\\ \rm\Rrightarrow z\propto xy^2`

Three variables are present hence joint variation