WAEC Mathematics 2020 Objective — Question 49
Question 49 of 50 from the West African Examinations Council (WAEC) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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If x = -2.5, what is the value of y on the curve?
- A. y = 8.0
- B. y = 8.5
- C. y = 9.0Correct
- D. y = 9.5
Explanation
Reading from the graph at x=-2.5 on the curve y=2x^2+x-1 (or as plotted), the corresponding y value is approximately 9.0.
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