Which of these graphs represents a function? y 5 In 4 4 3 2 1 2 1 사 +X 12345 -5 -4-3 -2 -111112 3 4 5 123 45 -5 -4-3-2 -11 - 2 13 4 5 1 2345 W. X. y y 5 4 3 2 4321 15 -4-3-2-11 2345 12345 A -5 -4-3-2 -11 -2 3 1 23 4 5 1 23 4 5 Y. Z. 1 1

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.