Question

Name the constant of proportionality for the equation below:

y = -2/3 x

Answer 1

`-(2)/(3)`

Explanation:

When variable y is said to be proportional to another variable x, it is written as:

`y \propto x`

To introduce the equality sign, we introduce what is called the constant of proportionality, say k and write the above as:

y=kx

Comparing the given equation:

`y=-(2)/(3)x`

We can see that our constant of proportionality:

`k=-(2)/(3)`