Question

thirty minutes into the dive, gabrielas dive computer displayed a water temperature of:
80 degrees fahrenheit.
81 degrees fahrenheit.
82 degrees fahrenheit.
84 degrees fahrenheit.

Explanation:

Locate the 30-minute mark on the x-axis (time). Follow the vertical line up to the blue square line (water temperature), then read the corresponding value on the right y-axis (water temperature in °F). The value at 30 minutes is 84°F.

Answer:

D. 84 degrees Fahrenheit.