If y = 12 when x = 6, find y when x = 9

Question

What does y equal?

Answer 1

(6,12), (9,?)

if y is directly related to x, then y= 18, y is twice x

y=kx

12=k(6)

k = 2

y=2x

y=2(9) = 18

that's probably the answer you want

if y is inversely related to x

then

y=x/k

12 =6/k

k = 1/2

y=x/(1/2) = 2x

y=2x

y=2(9) = 18