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Sketching a quadratic functionKey information for sketching quadratic functions

To sketch a quadratic function you must first determine the roots, nature and coordinates of the turning point and the y-intercept.

Part of MathsAlgebraic skills

Key information for sketching quadratic functions

When sketching a quadratic function, we need to know:

  1. roots (ie where the parabola cuts the x-axis)
  2. the nature and coordinates of the turning point
  3. y-intercept (ie where the parabola cuts the y-axis)

Look at the National 5 completing the square section before continuing.

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