The three curves A, B, and C are shown in the co-ordinate diagrams below. Two of the curves show a function of $x$. Put a tick (\u2713) in the correct box to show which curve does not show a function of $x$. Give a reason for your answer. Curve which is not a function of $x$: A [ ] B [ ] C [ ] Reason:

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The three curves A, B, and C are shown in the co-ordinate diagrams below - Junior Cycle Mathematics - Question 15 - 2017

Question 15

The three curves A, B, and C are shown in the co-ordinate diagrams below. Two of the curves show a function of $x$. Put a tick (\u2713) in the correct box to show... show full transcript

Worked Solution & Example Answer:The three curves A, B, and C are shown in the co-ordinate diagrams below - Junior Cycle Mathematics - Question 15 - 2017

Step 1

Curve which is not a function of $x$: C

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Answer

Curve C does not represent a function of $x$ because it passes the vertical line test, indicating that for some $x$ values, there are multiple corresponding $y$ values.

Step 2

Reason:

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Answer

Some $x$ values have more than one $y$ value.

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