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.
[tex]x\propto y[/tex]
x = ky
Where k is the constant of proportionality.
As given
x = 153 when y = 9
Put in the above
153 = 9k
[tex]k = \frac{153}{9}[/tex]
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 .
