Approximate the Area Under the Curve and Above the X-Axis $$f ( x ) = x ^ { 2 } - 3 x + 4 \text { from } x = 1 \text { to } x = 5 ; n = 4$$

Multiple Choice

Approximate the area under the curve and above the x-axis using n rectangles. Let the height of each rectangle be given
by the value of the function at the right side of the rectangle.
- $$f ( x ) = x ^ { 2 } - 3 x + 4 \text { from } x = 1 \text { to } x = 5 ; n = 4$$

A) 18
B) 38
C) 28
D) 48