Question: The results from a research study in calculus are shown Number of hours of study, x 1 2 3 4 5 6 7 in the

The results from a research study in calculus are shown Number of hours of study, x 1 2 3 4 5 6 7 in the chart. Use the data to answer the questions. f (x) Rate of extra points earned on exam, 4 7 12 11 12 16 25 (a) Plot the points in the chart and connect the points with line segments. Choose the correct graph below. O A. X B. O C. D. Af ( x) 30- Af ( x ) 30- Af ( x ) 30- Af (x) 30- 20- 20 20 20 10 X 10 X 10 X X 0 2 4 0 2 4 0 2 4 (b) Use the trapezoidal rule to find the area bounded by the broken line of part (a), the x-axis, the line x = 1, and the line x = 7. The area is approximately. (Round the final answer to three decimal places as needed. Round all intermediate values to four decimal places as needed.)

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