Question

The variable y is directly proportional to the variable x. If y = 12 when x = 14, what is the value of x when y = 247

A)
26

Answer 1

Answer: 288.17

Explanation:

y ∝ x

⇒ y = kx

substituting the given value of x and y , the equation becomes

12 = 14 k

therefore

k = 12/14

k = 6/7

The formula then becomes

y = 6/7 x

when y = 247, we have

247 = 6/7 x

6x = 247 x 7

6x = 1729

x = 1729/6

x = 288. 17