It's the first one. y = 3x
proportional means they are just some multiple of the other.
Combine like terms : 2 = p - 8
Add 8 on both sides : 10 = p
Hope this helps.
(4^p*4^1)^3) =4^15
add the exponents
(4^(p+1))^3 = 4^15
multiply the exponents
(4^3(p+1))= 4^15
the exponents have to be the same
3(p+1) = 15
divide by 3
p+1 = 5
subtract 1
p =4
Eric is not correct
p=4
