Example 1
Let 
. Use a trapezoid sum with 4 sub-intervals to estimate the area between the graph of f and the x-axis on [1, 3].
Example 2
Let g(x) = 3x + 2. Use a trapezoid sum with 3 sub-intervals to estimate the area between the graph of g and the x-axis on [0, 6].
Example 3
Values of the function f are given in the table below. Use a trapezoid sum with 8 sub-intervals to estimate the area between f and the x-axis on [2, 10].
Example 4
Values of the function f are shown in the table below. Use a trapezoid sum with the sub-intervals suggested by the table to estimate the area between f and the x-axis on [0, 10].
