Does the table represent a function? Why or why not?

[tex]\[
\begin{tabular}{|l|l|}
\hline
$x$ & $y$ \\
\hline
3 & 1 \\
\hline
4 & 3 \\
\hline
5 & 2 \\
\hline
6 & 5 \\
\hline
6 & 6 \\
\hline
\end{tabular}
\][/tex]

A. No, because the [tex]$y$[/tex]-values are positive.
B. No, because one [tex]$x$[/tex]-value corresponds to two different [tex]$y$[/tex]-values.
C. Yes, because every [tex]$x$[/tex]-value corresponds to exactly one [tex]$y$[/tex]-value.
D. Yes, because there are different [tex]$y$[/tex]-values.



Answer :

To determine whether the given table represents a function, we need to understand what constitutes a function. In mathematics, a function is defined as a relation between a set of inputs (called the domain) and a set of possible outputs (called the codomain), where each input is related to exactly one output.

Here is the given table in a structured form:
[tex]\[ \begin{array}{|c|c|} \hline x & y \\ \hline 3 & 1 \\ \hline 4 & 3 \\ \hline 5 & 2 \\ \hline 6 & 5 \\ \hline 6 & 6 \\ \hline \end{array} \][/tex]

Let's analyze this step-by-step:

1. Identify the inputs and outputs:
- Inputs ([tex]$x$[/tex]): 3, 4, 5, 6
- Outputs ([tex]$y$[/tex]): 1, 3, 2, 5, 6

2. Rule for functions: Each input in the domain should correspond to exactly one output in the codomain.

3. Examine each input:
- [tex]$x = 3$[/tex] corresponds to [tex]$y = 1$[/tex]
- [tex]$x = 4$[/tex] corresponds to [tex]$y = 3$[/tex]
- [tex]$x = 5$[/tex] corresponds to [tex]$y = 2$[/tex]
- [tex]$x = 6$[/tex] corresponds to [tex]$y = 5$[/tex] and [tex]$y = 6$[/tex]

4. Check for violations of the function rule:
- For [tex]$x = 6$[/tex], there are two different outputs: [tex]$y = 5$[/tex] and [tex]$y = 6$[/tex]. This violates the definition of a function because a single input ([tex]$x = 6$[/tex]) maps to multiple outputs.

Based on this analysis, we conclude that the given table does not represent a function.

Therefore, the correct answer is:

B. No, because one [tex]$x$[/tex]-value corresponds to two different [tex]$y$[/tex]-values.