Answer: Area under the curve between two points.
- A The slope of the tangent line at the upper limit
- B Area under the curve between two points
- C The instantaneous rate of change at a single point
- D The maximum value attained by the function on the interval
Correct answer: B. Area under the curve between two points
Explanation: A definite integral calculates the exact area under a curve between two x-values.
The exact area under the curve from a to b (shaded) is approximated by a few rectangles, the Riemann sum idea behind the definite integral.