Question

Two quantities, x and y, are directly proportional. If x is halved, what happens to y?

Answer 1

Y is also halved if they are proportional

Answer 2

Quantity y would also halve.

Explanation:

The theory says the following about proportionality: Quanties x and y are proportional if y can be defined like:

y = kx

where k is the constant of proportionality.

Let's have:

`y_(1)= kx_(1)`

Then if x halves, we would have:

`y_(2)= k(x_(1))/(2)`

Then, y would also halve:

`y_(2)= (y_(1))/(2)`