Question 13
Zachary has a computer program which accepts an input and produces an output. Some of the data are shown in the following table.
| Input | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Output | 4 | 7 | 10 | 13 | 16 | ? | 22 |
What is the output when the input is 6?

| Input | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Output | 4 | 7 | 10 | 13 | 16 | ? | 22 |
What is the output when the input is 6?
