Quick! 1. caleb needs $120 to pay for tickets to an amusement park. he has $75 already and saves $5 a week. use the segment tool to plot a graph representing the amount of money caleb has saved from the time he begins saving until he has saved enough for the tickets. 2. which relation is a function? a. {(1, −1), (−2, 2), (−1,  2), (1, −2)} b. {(1, 2), (2, 3), (3,  2), (2, 1)} c. {(1, 4), (2, 3), (3,  2), (4, 1)} d. {(4, 2), (3, 3), (2,  4), (3, 2)}