Question

If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11? y = StartFraction 5 Over 18 EndFraction (11) y = StartFraction 18 Over 5 EndFraction (11) y = StartFraction (18) (5) Over 11 EndFraction y = StartFraction 11 Over (18) (5) EndFraction

Answer 1

Answer: (18/5) * 11

Step-by-step explanation:

In equations of proportion, to proceed, we need to determine the constant of proportion, let's denote as "k"

Since y ~ x

Means y=kx.

To determine the value of k, we input initial values of y and x.

Initial value of y = 18

Initial value of x = 5

The equation becomes :

18 = 5k

k = 18/5.

Now, If given the value of x as 11,to determine the value of y we go back to the equation.

y= kx

y = 18/5 * 11.

Answer 2

Answer:

y =18/5 (11)

Step-by-step explanation:

Just took it. Edg 2020. Hope this helps :)