Answer: The relationship between the amount Steven charges and the time spent is a proportional relationship because the ratio of the amount he charges to the time spent remains constant. This is evident in the fact that he charges the same rate per hour for both 3 hours and 5 hours of work. For example, in the case of 3 hours of work, the rate is $15.75/3 hours = $5.25 per hour. In the case of 5 hours of work, the rate is $26.25/5 hours = $5.25 per hour. Since the rate per hour is the same in both cases, the relationship between the amount he charges and the time spent is proportional.