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Let X={1,2,3} and Y={4,5}.Find whether the following subsets of X x Y are functions from X to Y or not.$(iii)\quad h=\{(1,4),(2,5),(3,5)\}$

Note: This is part 3 of a 4 part question, split as 4 separate questions here.

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Toolbox:
• The given set of ordered pair subset of $x \times y$ function if same element $a \in x$ is not mapped on to two different elements of y
• The subset of $x \times$ is a function if it defines a mapping for each element of x an element of y
$h=\{(1,4),(2,5),(3,5)\}$

Since every element of X is mapped to an elements in Y, f is a function

answered Mar 13, 2013
edited Mar 30, 2013

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