Answer:
11
Step-by-step explanation:
22 is the largest number you are given in this diagram. 0 is the smallest. that would be your first step.
Next think about it as if you already know your midpoint, as in, midpoint being half of your ending value.
Lastly, you want to divide 22 in half, since midpoint is half of your line segment, and then answer you get is 11
