Question

Which is a correct interpretation of the slope of the line in this graph?

http://static.k12.com/calms_media/media/1349000_1349500/1349446/1/243b9e0f28b9a08c3701f1ccdf54e174137b95ce/150515.jpg

A.
The volume of water in the tank is decreasing by 2.5 L per hour.

B.
The volume of water in the tank is decreasing by 2 L per hour.

C.
The volume of water in the tank is decreasing by 0.5 L per hour.

D.
The volume of water in the tank is decreasing by 0.4 L per hour.