WAEC Mathematics 2021 Theory — Question 11
Question 11 of 22 from the West African Examinations Council (WAEC) Mathematics 2021 Theory paper, with the correct answer and a full explanation.
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7(b)-(c). Using a scale of 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y-axis, draw the graph of y=2x²-x-2 for -4≤x≤4. On the same axes, draw the graph of y=2x+3.
Model answer
Plot the table of values from part (a) as a smooth curve (parabola) for y=2x²-x-2, and plot the straight line y=2x+3 using two points, e.g. (0,3) and (2,7), on the same axes.
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