Question

X varies directly as y, and x = 153 when y = 9. Find x when y = 13.

Answer 1

Answer:

The value of x is 221 when  k = 17 and  y = 13.

Therefore the Option (C) is correct .

Step-by-step explanation:

As given

x varies directly as y.

$x\propto y$

x = ky

Where k is the constant of proportionality.

As given

x = 153 when y = 9

Put in the above

153 = 9k

$k = \frac{153}{9}$

k = 17

Now Find out the value of x when k = 17 and  y = 13.

x = ky

x = 17 × 13

x = 221

The value of x is 221 when  k = 17 and  y = 13.

Therefore the Option (C) is correct .

Answer 2

C. 221. 13 divided by 9 times 153