If x varies directly as y, and x = 48 when y = 16, find x when y = 5.
5/3, 153.6, 15

Solution:

Given: x varies directly with y(Direct proportion)

x = ay where a is a constant of proportionality

Now substitute the values of x and y

x = ay

48 = a(16)

a = 3

Determine the value of x by substituting the value of a and y

x = ay

x = (3)(5)

So we get,

x = 15

Therefore, the value of x is 15.

If x varies directly as y, and x = 48 when y = 16, find x when y = 5.

Summary:

If x varies directly as y, and x = 48 when y = 16, x is 15 when y = 5.