slope is change in y over change in x
use 2 points from the table so -3,-21 and -6,-39
change in Y: -39 - -21 = -18
change in x = -6 - -3 = -3
slope = -18/-3 = 6
slope = 6
Catherine walks her dog 5.25 miles because there are 7 days in one week and 3/4 x 7 = 5.25
