UK Secondary (7-11)
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Defining Functions and Relations

Interactive practice questions

True or False?

When working with a function, substituting a certain value of $x$x into the formula gives only one value of $y$y for that value of $x$x.

True

A

False

B

True

A

False

B
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What is the name used to describe a graph where for some value of $x$x, there exists two or more different values of $y$y?

True or False?

A horizontal line can intersect the graph of a function at more than one point.

Consider the following statement:

All relations are functions.

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