Question

If y varies directly as x and y =6 when x =2 ... find y when x=9

Answer 1

27

Explanation:

y = kx, where k is the constant of proportionality. If x = 2 and y = 6, that constant is determined as follows:

6 = k(2), or k = 3. Then y = 3x. When x = 9, y = 27