The graph represents jason's speed on a recent trip. for which time period is his rate of change negative?
a) between 0 and 5 minutes
b) between 5 and 10 minutes
c) between 10 and 20 minutes
d) between 20 and 25 minutes

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.