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iGCSE (2021 Edition)

4.05 Quadratic functions

Interactive practice questions

Does the parabola represented by the equation $y=x^2-8x+9$y=x28x+9 open upward or downward?

Upward

A

Downward

B

Upward

A

Downward

B
Easy
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The graph of $y=x^2+6$y=x2+6 has no $x$x-intercepts.

True or False?

Consider the given graph and answer the following questions.

Consider the given curve.

Outcomes

0606C2.1

Find the maximum or minimum value of the quadratic function f : x ↦ ax^2 + bx + c by any method.

0606C2.2

Use the maximum or minimum value of f(x) to sketch the graph or determine the range for a given domain.

0606C8.2

Transform given relationships, including y = ax^n and y = Ab^x, to straight line form and hence determine unknown constants by calculating the gradient or intercept of the transformed graph.

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