Question

Y is inversely proportional to x . When y = 9 , x = 8 Work out x when y = 18

Answer 1

Explanation:

y=k/x

9=8k

k=9/8

y=9/8x

18=9/8x

18 ÷ 9/8=x

So

18×8/9

=144/9

=16 SO X =16 WHEN y=18