To ensure that the table represents a function, each input must map to exactly one output. In the table you've provided:
- Input: 1, 2, 3, 2, 1
- Output: 5, 10, 15, 20, 24
We can see that the input "2" corresponds to two different outputs: 10 (the second value) and 20 (the fourth value). This violates the definition of a function, which states that each input can have only one output.
To correct this and make it a function, we need to change one of the outputs so that each input maps to only one output. For example, we can change the output corresponding to the second occurrence of input "2" (which currently outputs "20") to, let's say, "12".
Here is the revised table:
- Input: 1, 2, 3, 2, 1
- Output: 5, 10, 15, 12, 24
Explanation of Changes:
- Changed the output for the second occurrence of input "2" from 20 to 12.
By doing this, we've ensured that:
- Input "1" maps to output "5"
- Input "2" maps to output "10" (first occurrence)
- Input "3" maps to output "15"
- Input "2" maps to output "12" (second occurrence, but it now consistently maps to only one output)
- Input "1" maps to output "24" (first occurrence, but it consistently maps to one output)
Now, each input maps to exactly one output, fulfilling the requirement of a function.