Which are proportional and which are non proportional?
Carlos bought tires for $250 each with a discount of $50 off his total purchase.
Heather rented a hotel for $110 per night plus $18 per night for valet parking.
Drew paid $2.86 per pound of apples plus $0.10 for a grocery bag.
Manuel bought three pairs of shoes for $99 each plus a shipping fee of $6.
Proportional:
Carlos bought tires for $250 each with a discount of $50 off his total purchase.
Non-proportional:
Heather rented a hotel for $110 per night plus $18 per night for valet parking.
Drew paid $2.86 per pound of apples plus $0.10 for a grocery bag.
Manuel bought three pairs of shoes for $99 each plus a shipping fee of $6.