To find the rate of change, we need to calculate the slope of the line passing through the points (0,3) and (12,12).
Slope = (change in y) / (change in x)
(change in y) = 12 - 3 = 9
(change in x) = 12 - 0 = 12
Slope = 9/12 = 3/4
Therefore, the rate of change of the relation modeled in the table is 3/4.