Answer:
P plus 10
Explanation:
P plus 10 means you add 10 to the input to get the output. Let's see if it works.
2 + 10 = 12 ✔
7 + 10 = 17 ✔
3 + 10 = 13 ✔
5 + 10 = 15 ✔
4 + 10 = 14 ✔
Also, another way to be sure is if you know that no 2 numbers multiplied can equal 17 except for 1 and 17.