Solving average rate of change for a quadratic function using the formula (f(x) - f(a)) / (x - a).
A math problem on average rates of change from KutaSoftware's PreCalculus worksheet, showing the function f(x) = -x² - x + 1 over the interval [2, 7/3], with calculations for f(2) and f(7/3), and the average rate of change formula.