Question

Find y when x=15 if y=6 when x=30

Answer 1

Y = 12 because you multiply x by two to get x2, which is 30, and multiply y by two to get 12 - this is wrong, the answer is three, i did the math backwards

Answer 2

y=kx
6=k (30)
6/30=k(30)/30
.2=k
y=.2(15)
y=3
So y is 3.