Question

The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105?

F 3/5
G 1 2/3
H 7
J 15

Answer 1

J

Explanation:

`y \alpha x \\ (y)/(x) = k \\ (21)/(3) = (105)/(x) \\ x = 15`