I am really stuck if you could me please

Question

with this problem y=kxto find yfor x=6
y=-65when x=9
-65=k.9
k=- this is where I get stuck

Answer 1

Y = kx.
K = Y/X = (-65) / 9 = -7.22.

Y = (-7.22) * 6 = -43.3.