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 x is 0.4.

c. the slope of the line is 0.4.

d. a change of 2 units in 2 results in a change of 0.2 units in y.
e. a change of 3 units in 2 results in a change of 1.2 units in y.