Question

Which integer could represent the fact that the water level of a pool decreases by 4 feet

Answer 1

-4

1) In this question, there's not much information so let's think of a rule

2) We can sketch this out:

We could even write a function that describes this, which "W" stands for Water Level and "t":

3) So if the level of water is decreasing by 4 feet each and every water level from now on is negative.