Abstract
Figure 5.1 shows the relationship between the elements of a set Y, and those of a set X. It can be seen that if y ϵ Y and x is the value it is related to in X (shown by an arrow), then y = x + 2. This mathematical ‘rule’ which changes a value of x into a value of y is called a function ormapping. It can also be written f : x ↦ x + 2.
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© 1987 G. D. Buckwell
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Buckwell, G.D. (1987). Functions and Graphs. In: Work Out Mathematics GCSE. Macmillan Work Out Series. Palgrave, London. https://doi.org/10.1007/978-1-349-09462-2_6
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DOI: https://doi.org/10.1007/978-1-349-09462-2_6
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-44013-1
Online ISBN: 978-1-349-09462-2
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