How do I do this ? 19 points will mark brainlest

Answer: This is easier than you thought. 3.2 is equivalent to 3.20 so the spaces between would be 3.21, 3.22, 3.23 etc. the blue dot is 3.21
Step-by-step explanation:
Answer:
-3.21
Step-by-step explanation:
You can assume that between the "-3.2" and "-3.25" has a gap of 0.5 units
Seeing as there are 5 tick marks, each one must represent 0.1 units
-3.2+(-0.1) = -3.21