Turning point
What Turning point means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.
Definitions of Turning point
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Reference: Pearson Edexcel
The lowest point of an upward parabola or the highest point of a downward one, sitting halfway between the two crossings when the curve crosses the x axis twice.
The point deduced by reading the coordinates from the completed-square form, which is (−b/2, c − (b/2)²) for y = x² + bx + c.
The vertex where the curve changes direction; it is a minimum when a is positive and a maximum when a is negative.
The point where a quadratic curve changes from decreasing to increasing, or from increasing to decreasing.
Topics that use Turning point
- Graphs (AQA GCSE)
- Algebra - Graphs (Pearson Edexcel GCSE)
- Algebra - Solving equations and inequalities (Pearson Edexcel GCSE)
Related terms
- completing the square
- x-intercept
- Asymptote
- Asymptotes
- Coefficient
- coordinate plane
- Discriminant
- Displacement
Using Turning point in the exam
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