Answer:
At least 20
Step-by-step explanation:
I don't know what your answer options are or if there are more solutions beyond the picture. By counting the blue dots on the red line, you have your answer, which I counted 20 from what is seen.
*Note: Since there are dots all over the line, I assume there are likely more than the 20 shown. Hence, why I said "at least 20." If that isn't one of your options, then I would just say 20, because that is what is shown.
Edit: I saw on another one of your problems that an answer is "infinite answers" or something. That is your answer for this.
