Use a graphing calculator to plot each set of points. Which set shows a negative trend? a {(7, 3), (4, 0), (2, −3), (9, 5)}
b {(−1, 9), (2, 4), (−2; 12), (5, 1)}
c {(4, 5), (8, −1), (2, 3), (−4, −2)}
d {(0, 0), (−4, −7), (6, 9), (−2, −3)}