Question

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

How..? Thanks you!

Answer 1

use y = kx where k is a constant

Answer 2

x = ky
48 =16k
k =3
x =3y
so when y =5
x = 3*5
x =??

Answer 3

\[\large x = k \times y\]

Find k by plugging x = 48 and y = 16

After finding k, put y = 5 and find x in the same equation..