Calculating the average rate of change for a function modeling the US dollar's value in Indonesian rupiah over a 5-day period.
A handwritten math problem and solution involving the average rate of change of a function R(t) = 7500 + 500t - 100t², representing the value of the US dollar in Indonesian rupiah over time. The calculations for intervals [0, 5], [1, 3], and [2, 4] are shown with red, green, and purple annotations.