GCSE Maths (Edexcel)

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Algebra Graphs

Shape of a Cubic Graph

4:02 recognise, sketch and interpret graphs of linear functions, quadratic functions, simple cubic functions, the reciprocal function y = 1/x with x ≠ 0, exponential functions y = kˣ for positive values of k, and the trigonometric functions (with arguments in degrees) y = sin x, y = cos x and y = tan x for angles of any size
Spec A12
Previous Turning Point of a Quadratic Next Shape of a Reciprocal Graph
  • Cubic expressions have the highest power in X as X cubed
  • Cubic graphs have a characteristic S shape
  • Positive cubics start in the bottom left quadrant and end in the top right quadrant
  • Negative cubics start in the top left quadrant and end in the bottom right quadrant
  • Cubic graphs can have one or two turning points
  • Turning points in cubic graphs are not the minimum or maximum values of the function

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310

questions for Algebra

95

questions for Graphs