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7.03 Identifying functions

Interactive practice questions

Express the relation $\left\{\left(2,2\right),\left(4,4\right),\left(6,3\right),\left(7,5\right)\right\}${(2,2),(4,4),(6,3),(7,5)} in the table below.

$x$x $y$y
$2$2 $\editable{}$
$4$4 $\editable{}$
$6$6 $\editable{}$
$7$7 $\editable{}$
Easy
< 1min

Express the relation $\left\{\left(1,2\right),\left(3,5\right),\left(7,8\right),\left(8,11\right)\right\}${(1,2),(3,5),(7,8),(8,11)} as a series of points on the coordinate axes.

Easy
< 1min

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.

Easy
< 1min

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?

Easy
< 1min
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Outcomes

8.F.A.1

Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output. (Function notation is not required in 8th grade.)

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