Question

x varies inversely as y2, and x = 4 when y = 10. Find x when y = 2.

Answer 1

\[x = \frac{ k }{ y ^{2}}\] because x varies inversely

Sub in x=4, y=10 to find k
sub in k, y=2 to find x

Answer 2

So, x =100

Answer 3

yes, x=100 is correct.