IGCSE Maths / Quadratic equations, curves and inequalities
Drawing a quadratic curve revision notes
Edexcel International GCSE Maths (4MA1), chapter 22: Quadratic equations, curves and inequalities, specification point 3.3j-f. Part of the full course.
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To draw a quadratic graph, calculate the y-value for each chosen x-value, plot every resulting point and join them with one smooth curve. Careful substitution, especially when x is negative, helps you plot the curve accurately.