Jamal works as an electrician's apprentice. He rewired 4 electrical outlets in 1 1/2 hours. If he works at the same pace for 7.5 hours, how many outlets will he rewire?

5 outlets

13 outlets

20 outlets

30 outlets

This can be solve by first solving the proportionality constant

Number electic outlets rewired is directly proportional to time spent

4 = (1 ½) a

Let be the proportionality constant

A = 8/3

O = (8/3) (7.5)

o = 20 outlets will jamal rewired if he works for 7.5 hrs