WAEC Mathematics 2021 Theory — Question 10

Question 10 of 22 from the West African Examinations Council (WAEC) Mathematics 2021 Theory paper, with the correct answer and a full explanation.

7(a). Copy and complete the table of values for the relation y=2x²-x-2 for -4≤x≤4.

Model answer

Substituting each x-value: x=-4→y=34; x=-3→y=19; x=-2→y=8; x=-1→y=1; x=0→y=-2; x=1→y=-1; x=2→y=4; x=3→y=13; x=4→y=26.

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