\begin{tabular}{|c|c|}
\hline
Input & Output \\
\hline
12 & 11 \\
\hline
14 & 12 \\
\hline
16 & 13 \\
\hline
18 & 14 \\
\hline
\end{tabular}

Which of the following is the relationship between all inputs and outputs shown in the table?

A. Divide by 2, then add 5
B. Subtract 1
C. Subtract 2
D. Add 5, then divide by 3



Answer :

Let's determine the relationship between the inputs and outputs by analyzing each suggested relationship step-by-step.

### Relationship 1: "Divide by 2, then add 5"
1. For input 12:
[tex]\[ \left(\frac{12}{2}\right) + 5 = 6 + 5 = 11 \quad \text{(Matches output 11)} \][/tex]
2. For input 14:
[tex]\[ \left(\frac{14}{2}\right) + 5 = 7 + 5 = 12 \quad \text{(Matches output 12)} \][/tex]
3. For input 16:
[tex]\[ \left(\frac{16}{2}\right) + 5 = 8 + 5 = 13 \quad \text{(Matches output 13)} \][/tex]
4. For input 18:
[tex]\[ \left(\frac{18}{2}\right) + 5 = 9 + 5 = 14 \quad \text{(Matches output 14)} \][/tex]

Since all input-output pairs match using this relationship, this appears to be a potential correct relationship.

### Relationship 2: "Subtract 1"
1. For input 12:
[tex]\[ 12 - 1 = 11 \quad \text{(Matches output 11)} \][/tex]
2. For input 14:
[tex]\[ 14 - 1 = 13 \quad \text{(Does not match output 12)} \][/tex]

Since this relationship does not hold for input 14, it is not the correct relationship.

### Relationship 3: "Subtract 2"
1. For input 12:
[tex]\[ 12 - 2 = 10 \quad \text{(Does not match output 11)} \][/tex]

Since the first pair does not match, this relationship is incorrect.

### Relationship 4: "Add 5, then divide by 3"
1. For input 12:
[tex]\[ \left(\frac{12 + 5}{3}\right) = \left(\frac{17}{3}\right) = 5.\overline{66} \quad \text{(Does not match output 11)} \][/tex]

Since the first pair does not match, this relationship is incorrect.

Based on this step-by-step examination, the correct relationship between the inputs and outputs in the given table is:
"Divide by 2, then add 5."

This is confirmed as the correct relationship fits all input-output pairs.