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Thank you for your question!
I would not use the numeric indicator for the whole numbers or for the fractions that are below the number line. This follows the intent of the 2010 Guidelines and Standards for Tactile Graphics. [Pssst! Not using numeric indicators at the beginnings of labels below a number line also follows what the 2022 GSTG will say. Though not yet published, the text of the 2022 GSTG has been approved by the BANA Board and is now being carefully prepared for general distribution.]
P.S. If I had a mixed number below a number line, then I would use a numeric indicator before that mixed number's fractional part. Your example does not have that; I just want to be wildly thorough. A related thread here on Ask an Expert is Time on number lines.