[tex]\begin{gathered} \text{average rate of change = }\frac{f(x_2)-f(x_1)}{x_2-x_1_{}} \\ f(x_2)=f(7)=11(49)+10=549 \\ f(x_1)=f(-2)=11(4)+10=54 \\ \text{average rate of change=}\frac{549-54}{7-(-2)} \\ \text{average rate of change=}\frac{495}{9} \\ \text{average rate of change=}55 \end{gathered}[/tex]
