Question

Find y when x = 14 if y varies directly with x2, and y = 72 when x = 6

Answer 1

well direct variation is

\[y = kx^2\]

k is the constant of variation

so you need to find k as the 1st task, substitute x = 6 and y = 72 to find k.

the you can substitute x = 14 into the new equation to find y

hope it helps