What is the function rule for input 2 output 6 input 4 output 7 input 6 output 8 input 8 output 9

Answer 1

2--6
4--7
6--8
8--9

difference in the x's is 2, difference in the y's in 1
slope = 1/2

y = (1/2)x + b
use one of the values e.g. (2,6)
6 = (1/2)(2) + b
5 = b

y = (1/2)x + 5