Question

y varies jointly with p and q. When p = 4 and q = 5, y = 60. Find y when p = 5 and q = 8.

Answer 1

y = k p q
k = 60/20 = 3

y = 3 * 5 * 8 = 120

Answer 2

@FutureMathProfessor You copied that from Yahoo answers

Answer 3

Great