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A function is given by a table of values, a graph, a formula, or a verbal description. Determine whether it is one-to-one.

$f$ is not one-to-one because $2 \neq 6,$ but $f(2)=2.0=f(6)$

00:41

Jeffrey P.

Calculus 1 / AB

Calculus 2 / BC

Calculus 3

Chapter 1

Functions and Models

Section 5

Inverse Functions and Logarithms

Functions

Integration Techniques

Partial Derivatives

Functions of Several Variables

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The question here is whether or not F is a 1 to 1 function. So in order to be 1 to 1 for every X value, there's only one why value? And for every y value, there's only one X value. So when we look at the table, we see that we have a Y value of 2.0, that corresponds to two different X values, so that means it's not 1 to 1.

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