Question

y is proportional to x^2 when x=5 y=100 work out the value of y when x=3

Answer 1

Answer:

y = 36

Step-by-step explanation:

y = ax²

100 = a (5)² → 100 = 25a → a = 4

y = 4x²

x = 3 → y = 4(3)² = 36