Vince is participating in a fun run to raise money for the west side children's hospital. the run is held at vince's high school track. the more laps vince runs around the track, the more money he raises for the hospital. there is a proportional relationship between the number of laps vince runs, x, and the amount of money he raises for the hospital (in dollars), y. what is the constant of proportionality? write your answer as a whole number or decimal. dollars per lap