Introduction to Functions

This video from patrickJMT explains the notation used to describe functions.

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These notes from mathcentre explain what a function is. Try the exercises on page 2 to practise what you have learned.

A pdf of this document can be downloaded here.

This video from ProfessorDaveExplains shows how to plot the graph of linear functions.

Note: All Professor Dave Explains content is available for free at www.youtube.com/professordaveexplains.

In this video patrickJMT shows how to plot the graph of a quadratic function.

Note: All patrickJMT content is available for free at www.youtube.com/user/patrickJMT.

Patrick JMT’s Website: www.patrickjmt.com.

These notes from mathcentre go into more detail on plotting the graph of a function.

A pdf of this document can be downloaded here.

Use GeoGebra graphing calculator below to plot the functions $y=2x-5$, $y=-3x+7$, $y=x^2 + 4$ and $y=-3x^2 + 2x -1$. Adjust some signs/numbers and notice how the graphs change.

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This video from Khan Academy explains how to identify the range and domain of some functions.

Note: All Khan Academy content is available for free at www.khanacademy.org.

These notes from mathcentre (particularly pages 4-7) explain the range and domain of functions in more detail. Try the exercises included to test your understanding of the range, the domain and functions in general.

A pdf of this document can be downloaded here.

Try the following NUMBAS exercises to practise what you have learned about the domain and range of functions.

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