Question

If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?

1/9
2/3
54
96

Answer 1

2/3

Explanation:

y = xk

6 = 72K Solve for k Divide both sides by 72

`(1)/(12)` = k

y = xk

y =
`(8)/(1)` x
`(1)/(12)`

y =
`(8)/(12)` I can simplify by dividing the numerator and denominator by 4

y = 2/3