Green plants live in the ocean at maximum and minimum depths described by the absolute value equation |15-d|-15=0, where d is depth, in meters. Graph the equation on a number line to determine the maximum and minimum depths at which green plants live in the ocean.

Answer 1

|15-d|-15=0
|15-d| = 15

so you want |15-d| ≤ 15

15-d ≤ 15 and -15 + d ≤ 15
-d ≤ 0 and d ≤ 30
d ≥ 0 and d ≤ 30

0 ≤ d ≤ 30