Question

y is directly proportional to the square of x. If y = 100 when x = 5, find
a a the formula for y in terms of x
b y when x = 6
c. X when y= 4.

Answer 1

Answer:

y = k*x^2

32 = k*3^2 = 9k, or

k = 32/9

So when x = 12.5, y = (32/9)*12.5^2 =