Answer: %7,500 , the constant of proportionality would be 1500m (m=one month)
Step-by-step explanation: At this rate, by the time he gets to 6 months he will have made $9,000. Divide this by six to get $1,500 (the unit rate for 1 month). Multiply $1,500 by 5 to get your answer. hope this helps
(NOT SURE ON THE CONSTANT PROPORTIONALITY THING!!!)