Answer: the independent variable would be m (minutes spent talking on the phone)
Explanation: the cell phone bill will be affected by how many minutes is spent talking on the phone. However the nothing will affect how many minutes is spent on the phone.
The answer is a, this is because 5(2+4) is the same as multiplying 5 by 6 to get 30. The reason we do this is because the length of the entire side is the sum of the bottom numbers