Thread: Need help yet again, direct proportionality

Hi, this time its:
Q is directly proportional to the square of R

Q = 3 when R= 4

a)Find a formula for Q in terms of R

b)Work out the value of Q when R= 8


I know you have to find K or something but please help
Thanks
Matt

First, find k, your constant of proportionality.



Use the initial conditions they gave you to find k.