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Two diagrams, labelled A and B, are shown below - Junior Cycle Mathematics - Question 15 - 2015

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Question 15

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Two diagrams, labelled A and B, are shown below. One diagram represents a function; the other does not. Diagram A Diagram B State ... show full transcript

Worked Solution & Example Answer:Two diagrams, labelled A and B, are shown below - Junior Cycle Mathematics - Question 15 - 2015

Step 1

State which diagram does not represent a function.

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Answer

Diagram B does not represent a function.

Step 2

Justify your answer.

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Answer

A function relates each item in its domain (left set) to a single item in its range (right set). Diagram B relates the diamond figure on the left to two items on the right instead of just one. In contrast, Diagram A is a function since each item on the left is mapped to one item on the right.

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