2.01 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

False

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

True or False?

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

Easy

< 1min

Consider the following statement:

All relations are functions.

Easy

< 1min

understand the concept of a function as a mapping between sets, and as a rule or a formula that defines one variable quantity in terms of another

understand the concept of the graph of a function

recognise the distinction between functions and relations, and the vertical line test