Maths Problem- Need Urgent Help!!?

Hey there, i need this maths problem finished and pronto! It is regarding proportion. IMPORTANT- Answers should include full method working for each part of the question- clearly labelled and correct. Here comes the question: y is directly proportional to the square of x. y=72 when x=2 a) Express y... show more Hey there, i need this maths problem finished and pronto!

It is regarding proportion.

IMPORTANT- Answers should include full method working for each part of the question- clearly labelled and correct.

Here comes the question:

y is directly proportional to the square of x.
y=72 when x=2

a) Express y in terms of x

b) Work out the value of y when x=1/2.

Please remember full working all clearly labelled.

Many thanks- and be speedy!
7 answers 7