Number Line Problem: Find the Value at the Red Point (0-9 Scale)

Let's pay attention to the numbers on the axis from left to right:

$0,2,3,5,6$

We'll try to find the common pattern.

Note that the difference between 0 and 2 is 2+

The difference between 2 and 3 is 1+

The difference between 3 and 5 is 2+

The difference between 5 and 6 is 1+

Therefore, the next operation is 2+:

$6+2=8$