Question

PLEASE HELP. The value of "y" varies directly with "x".

If y 6, then x = 2.
Find "y" if x = 5.
k = 3
y = [?]

Answer 1

y=15

Explanation:

y varies directly as x so:

y=k(x)

y = kx

if y is 6 and x is 2;

input the values

y=kx

6=k(2)

`(6)/(2) = (2k)/(2)`

k = 3

then find y if x=5

use the previous formula

y=kx so:

y=3(5)

therefore y=15