You can put this solution on YOUR website! What? Graph to be on just a number line? Twos? Increments of two each? Why the comma in your number? Meant for decimalization or meant as two separate numbers?
At least one of these should help you.
If you mean for negative six and positive three:
If you mean for negative six and three tenths:
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Student: What you posted, "how would I graph -6,3 on a graph that goes by twos", is not what you really have. Give your exact problem exercise exactly, word for word as you find it in your book or material.