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

Answer:

The  value of y when x = 90

         y = 22.5

Step-by-step 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)

                    $k = \frac{45}{180} = 0.25$

Step(ii):-

The  value of y when x = 90

                  y = 0.25 × 90 = 22.5

                 y = 22.5