Answer:
if the temperature decreases by x degrees per day for y days
Step-by-step explanation:
A rational number is a number of the form [tex]\frac{p}{q}\,,q\neq 0[/tex] such that p and q are integers.
Consider a situation: if the temperature decreases by x degrees per day for y days
Temperature decreases by [tex]x[/tex] degrees is denoed by [tex]-x[/tex].
Therefore,
Total decrease in temperature in [tex]y[/tex] days is denoted by [tex]-xy[/tex].
So, this situation could be solved using the product of [tex]xy[/tex], where [tex]xy[/tex] represents a negative value