How to Solve Parabola for Grade 12 Mathematics – ECZ Zambia

Parabola is one of the most tested topics in ECZ Grade 12 Mathematics Paper 2. In this lesson, you’ll learn how to identify the key parts of a quadratic graph, find the vertex, axis of symmetry, x-intercepts and y-intercepts, and how to sketch the curve correctly for full marks.

This is a complete step-by-step video lesson using an ECZ past paper style question. Follow along, pause, and practice the method shown. Once you understand this pattern, every Parabola question in the exam becomes predictable.

Watch the Full Lesson Video

Video Credit: Leon Kaoma

Quick ECZ Revision Notes

• Standard Form: y = ax² + bx + c
• Vertex x-coordinate: x = -b/2a
• Opens Up: if a > 0 | Opens Down: if a < 0
• Y-intercept: set x = 0
• X-intercepts: set y = 0 and solve

Tip for ECZ: Always label your vertex, intercepts, and axis of symmetry on your sketch. ECZ examiners award method marks even if your curve is not perfect.

Need more practice? See our Grade 12 Mathematics Past Papers →