3. Functions
3.01 Review: Functions and relations
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
< 1 min
True or False?
When we work 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
< 1 min
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
< 1 min
True or false?
A relation always passes the vertical line test.
Easy
< 1 min
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