can someone help me find the function of this input and output graph??? I need help will give brainiest to the right answer

Answer:
[tex]f(x) = 3x+2[/tex] (third option)
Step-by-step explanation:
Substitute it.
3*3+2=11
3*5+2=17
3*7+2=23
3*9+2=29
Hope it helps! :)