ECZ 2016 · O-Level Paper 1 — Quadratic Functions
The sketch shows the graph of y = 3 − 2x − x², passing through P, Q and R. Find the equation of the axis of symmetry of the graph.
- A. x = 1
- B. x = −1
- C. x = 3
- D. x = −2
Verified working — step 1
For y = −x² − 2x + 3, the axis is x = −b⁄(2a) = −(−2)⁄(2 × −1) = …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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