Which of the following situations does NOT represent a proportional function? A The total number of marbles in terms of the number of weeks, if Francisco has 36 marbles and purchases 5 additional marbles per week

B The amount of earnings in terms of the number of sales Francisco has made, if $9.50 is earned for each sale

C The total number of points scored by Francisco in terms of the number of goals made, if 2 points are scored for every goal that is made

D The length of a paved sidewalk in terms of the number of days Francisco has worked for a period of 12 days, if exactly 40 feet of sidewalk is paved each day