Question

The value of y is directly proportional to the value of x. If y = 45 when x = 180, what is the

value of y when x = 90?

Answer 1

The value of y when x = 90

y = 22.5

Explanation:

Step(i):-

The value of y is directly proportional to the value of x.

Y∝ X

y = k x

If y = 45 when x = 180

45 = k ( 180)

`k = (45)/(180) = 0.25`

Step(ii):-

The value of y when x = 90

y = 0.25 × 90 = 22.5

y = 22.5