Question

What is the constant of proportionality of `y=3x`?

Answer 1

`3`

Explanation:

In lines such as `y=14x`, `y=x`, and so on, the `y` values are a result of the constant of proportionality being multiplied by the `x` value.

`y` results from something being multiplied by `x`, and the values are always proportional to one another.

`y=3x rarr` Some points on this line would be `(1, 3), (2, 6), (3, 9)`

Notice that putting these points into a ratio of x-value to y-value results in `1:3` as a simplified version.

So, the constant of proportionality is what `x` is being multiplied by to get `y`. In this case, it is `3`.