Question

Which equation repesents a direct proportion?

Answer 1

Answer c because it is timing it by two

Answer 2

C.
`2y=10x`

Explanation:

In mathematics, a direct proportion is defined as

`y=kx`

Where
`k` is a constant of proportionality.

One way to describe this proportionality is to say that "if we increase one variable, the other one will also increase", "if we decrease one variable, the other one will also decrease".

But, in this case, the right answer is the one that has the same form as the defintion
`y=kx`.

Therefore, the right anwer is C.

`2y=10x`

`y=5x`

Where the constant is 5.