Question

If y varies directly as x and y equals 20 when x=5 then what is y when x is 8

Answer 1

Answer: y = 32

y=kx

20/5=k*5/5

4=k

y=4x

4*8=32

y=32

Explanation:

:)

Answer 2

y =32

Explanation:

If y varies directly as x

y = kx

y equals 20 when x=5

20 = k(5)

We can solve for k

Divide each side by 5

20/5 = 5k/5

4 =k

y = ? when x is 8

y = 4x

y = 4(8)

y =32