Which of the following statements are true?

Choose all answers that apply:

A. The equation represents a proportional relationship.

B. The unit rate of change of y with respect to a is 7/2

C. The slope of the line is 2/7

D. A change of 7 units in a results in a change of 2 units in y.

E. A change of 6 units in a results in a change of 21 units in y.