a number line is below. where is the ? on the number line?

a number line is below. where is the ? on the number line?
Answer
Explanation:
Step1: Determine the interval size
The distance between - 6 and 0 is 6 units and there are 3 intervals. So each interval is $\frac{6}{3}=2$ units.
Step2: Count intervals from 6
The question - mark is 3 intervals to the right of 6. Each interval is 2 units, so we add $3\times2$ to 6. $6 + 3\times2=6 + 6 = 12$
Answer:
12