Answer:
Water level at end of the 3 months = 3* -1 = -3 feet.
Step-by-step explanation:
Here the water level at a lake continued to change at the same rate for 3 months in a row.
For instance, if the water level decrease, we represents it by a negative number.
If the water level increases, we represents it by a positive number.
To estimate, we try to represents the fractions in to whole number.
For instance, if the water level decreases at the rate of [tex]\frac{4}{5} \\[/tex] feet per month, which is close to 1. Since it is decreases we represents it by -1.
If the water level increases, we represent it by a positive number.
To represent the water level at end of the 3 months, we have to multiply -1 by 3.
Water level at end of the 3 months = 3* -1 = -3 feet.