Which situation describes a proportional relationship? Responses Buying a hamburger at full price and then using a coupon for $1.00 off the second hamburger. Buying a hamburger at full price and then using a coupon for $1.00 off the second hamburger. Buying 2 hamburgers for $8 and getting the third hamburger half off. Buying 2 hamburgers for $8 and getting the third hamburger half off. Buying 4 hamburgers for $3.50 each. Buying 4 hamburgers for $3.50 each. Buying 2 hamburgers and a drink for $12.80 and leaving a $2 tip.