Question

water depth
a. all integers less than or equal to 8
b. all real numbers less than or equal to 8
c. all positive real numbers
d. real numbers from 0 to 8

Explanation:

The graph represents water depth over time. Time (x - axis) starts at 0 (when we begin measuring) and goes until the water depth reaches 0 at 8 minutes. Time can be any real number in this interval (not just integers), and it must be between 0 and 8 (inclusive) because before 0, we aren't measuring, and after 8, the water is already at 0 depth. So the domain (time values) is real numbers from 0 to 8.

Answer:

D. Real numbers from 0 to 8