Question $14$

Find the average value $off(x)=3x^{2}on$ the interval $2,7.$

$3(7{)}^2-3(2{)}^2$

$7^3-2^3$

$\frac{1}{5}(6(7)-6(2))$

$6(7)-6(2)$

$\frac{1}{5}(7^3-2^3)$

$\frac{1}{5}(3(7{)}^2-3(2{)}^2)$