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To check whether (x2-x1)/(v2-v1) is a perfect integer, he considered the float value and floor value of it.
Floor gives the number that is less than original number.
15.4 gives 15. -13.2 gives -14
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Number Line Jumps
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To check whether (x2-x1)/(v2-v1) is a perfect integer, he considered the float value and floor value of it. Floor gives the number that is less than original number. 15.4 gives 15. -13.2 gives -14