Alayna parks her car in a lot that charges by the quarter hour. the table shows the parking fee, in dollars, with respect to the time, in hours. time (hours) 0.25 0.5 0.75 1 1.25 1.5 parking fee $0.50 $1.00 $1.50 $2.00 $2.50 $3.00 time is the variable and should be placed on the . parking fee is the variable and should be placed on the .