Last week Len spent $18 to bowl four games. This week he spent $27 to bowl six games. Len owns his bowling ball and shoes so he only has to payfor each game that he bowls. If each of these bowling gam

Last week Len spent $18 to bowl four games. This week he spent $27 to bowl six games. Len owns his bowling ball and shoes so he only has to payfor each game that he bowls. If each of these bowling games costs the same amount of money what is the constant of proportionality between the money spent and the number of games played?