Question

If y is inversely proportional to x, and y = 60 when x = 3, what are the values of y when x = 5 and x = 4?

Answer 1

36

45

Explanation:

Standard equation of inverse proportion:

y = k/x

For x = 3, y = 60. We plug in these values and find the value of k.

60 = k/3

k = 180

The equation is

y = 180/x

For x = 5:

y = 180/5

y = 36

For x = 4:

y = 180/4

y = 45