the function is continuous on the interval [10, 20] with some of its values given in the table above. Estimate the average value of the function with a Trapezoidal Sum Approximation, using the intervals between those given points. x: 10, 12, 15, 19, 20 f(x)–2–5–9–12–16
answer choices: –8.750 –7.000 –8.400 –5.50