Waec Model Questions Vol1 2019 Mathematics Question 11

Practice essay / theory question 11 from the 2019 Waec Model Questions Vol1 Mathematics examination. This question covers Graphs .

Waec Model Questions Vol1 2019 Mathematics Essay / Theory

Topic: Graphs

Question 11 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • MATHEMATICS • essay

Waec Model Questions Vol1 2019 Mathematics Question 11 diagram

The graph below shows the monthly sales (in thousands of Naira) of a retail store over a period of six months.

Question Parts

( a )

Calculate the average rate of change of sales between month 2 and month 5.

( b )

Using linear interpolation between month 4 and month 5, estimate to two decimal places the month when sales reached 20 000 Naira.

( c )

Approximate the total sales over the six‑month period by calculating the area under the graph using the trapezoidal rule (Δx = 1 month). Give your answer in thousands of Naira.

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About This Question

This is Waec Model Questions Vol1 2019 Mathematics Question 11. It is one of the essay questions from the 2019 Waec Model Questions Vol1 Mathematics examination.

The question covers Graphs .

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