If g varies directly with the square of h and g = 36 when h = 3 find the constant variation.

g = kh²

• g = kh² ; g = 36 and h = 3
• 36 = k(3)²
• 36 = k9
• 9k = 36
• 9k/9 = 36/9
• k = 4

Thus, the constant variation is 4.