Answer:
Quantity y would also halve.
Step-by-step 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:
[tex]y_{1}= kx_{1}[/tex]
Then if x halves, we would have:
[tex]y_{2}= k\frac{x_{1}}{2}[/tex]
Then, y would also halve:
[tex]y_{2}= \frac{y_{1}}{2}[/tex]
