Question

key
▲ depth
■ water temperature
at the surface, gabrielas dive computer displayed a water temperature of:
○ 82 degrees fahrenheit.
○ 84 degrees fahrenheit.
○ 86 degrees fahrenheit.
○ 88 degrees fahrenheit.

Explanation:

The surface corresponds to 0 feet depth on the left y-axis. At time 0 minutes (start, surface), the water temperature (blue squares) aligns with 86°F on the right y-axis.

Answer:

86 degrees Fahrenheit.