Answer :
by considering what question says we have:
y=2.25x+4
so
passenger 1:y=2.25(4.8)+4=14.8
passenger 2:y:2.25(7.3)+4=20.425
total:14.8+20.425=35.225
y=2.25x+4
so
passenger 1:y=2.25(4.8)+4=14.8
passenger 2:y:2.25(7.3)+4=20.425
total:14.8+20.425=35.225