The Following Graph Shows the Curb Weight of Seven Cars

The following graph shows the curb weight of seven cars, in pounds, along with their corresponding highway miles per gallon.

A) Miles per gallon is the independent variable in the graph.
B) As the curb weight increases, the highway miles per gallon tend to increase.
C) Curb weight is the dependent variable in the graph.
D) As the curb weight increases, the highway miles per gallon tend to decrease.