ECZ 2014 · O-Level Paper 1 — Quadratic Functions
Given that y = kx² − 1, where k is a constant, and that y = 17 when x = 3, find the value of k.
- A. 2
- B. 169
- C. 18
- D. 6
Verified working — step 1
Substitute: 17 = k × 3² − 1 = 9k − 1. So 9k = 18 and k = …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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question