Transformation - SSAT Upper Level Quantitative

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Question

Function 2

What equation is graphed in the above figure?

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Answer

The greatest integer function, or floor function, , pairs each value of with the greatest integer less than or equal to . Its graph is below.

Floor function

The given graph is the above graph shifted downward four units. The graph of any function shifted downward four units is , so the given graph corresponds to equation .

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