Question

The variables y and x have a proportional relationship, and y = 12 when x = 5.

What is the value of y when x = 8?

Answer 1

y = 19.2

Explanation:

We know there is relationship between y and x, so according to the formula
`y = kx`

k = 12/5

we get one function y = 2.4x

when x = 8, input it into the function,

y = 2.4×8 = 19.2

Answer 2

Y= (12x8) / 5
Y= 19.2