Question

Y is directly proportional to x*2.when x=2,y=36.

a)express y in terms of x.
b)calculate the value of x when y=49

Answer 1

a) y=9x²

b)
`x = - 2 (1)/(3) \: or \: x = 2 (1)/(3)`

Explanation:

Please see attached picture for full solution.