Julia simplified the expression 1 1/2 -4 1/2(1/2x - 1) Are her steps correct? If not, describe
where she went wrong, and solve it correctly showing all work.

1 1/2- 4 1/2(1/2x-1)
-3(1/2x - 1)
-3(1/2x)-3(-1)
- 3/2x + 3

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )