ECZ 2017 · GCE Paper 1 — Quadratic Functions
The diagram shows a sketch of the graph of y = x² − 6x + 8, cutting the x-axis at B(2, 0) and C(4, 0). Find the coordinates of the turning point of the graph.
- A. (3, 1)
- B. (3, −1)
- C. (−3, −1)
- D. (0, 8)
Verified working — step 1
The turning point lies midway between the roots: x = 2 + 42= 3. Substituting: y = 9 − 18 + 8 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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