Use a graphing calculator to determine the linear, quadratic, or exponential equation that best represents the data. For linear and quadratics, round slope, y -intercept, and coefficients to the nearest integer. For exponential, round a to the nearest integer and b to the nearest tenth. Month Average Rainfall (inches) 1 15.15 2 11.11 3 8.23 4 5.15 5 3.06 6 2.57 7 2.57 8 2.42 9 2.37 10 2.12 11 2.03 12 1.90