Functions
Functions go beyond just x and y. Find a full range of function resources, including graphic tips, guides to function notation, and key formulas.

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Customize Cell Data with Excel's IF Function

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Understanding the XIntercept of a Quadratic Function

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How to Convert Angles from Radians to Degrees in Excel

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Excel REPLACE/REPLACEB Function

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Excel DAY/DAYS Functions

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Excel DAYS360 Function: Count Days Between Dates

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Excel ISBLANK Function

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Sum Cells that Meet Multiple Criteria with Excel SUMPRODUCT

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Properly Enter Dates in Excel with the DATE Function

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Use Excel's TYPE Function to Check the Type of Data in a Cell

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Find the Third Smallest or Sixth Largest Number in Excel

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Guide to Parent Functions

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Calculate the Percentage of Specific Values in Excel

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Excel MultiCell Array Formulas

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How to Convert Text to Upper, Lower, or Proper Case in Excel

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Rounding Numbers in Excel Online

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Use the AVERAGEIF Array Formula to Ignore Errors in Excel

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Find Cells Containing Numbers With Excel's ISNUMBER Function

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Parallel, Perpendicular, or Neither?

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Find the Largest Negative or Positive Number in Excel

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Excel DATEVALUE Function

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Using Labels in Excel 2003 Formulas and Functions

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Evaluate Functions With Graphs

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Excel's HLOOKUP Function

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Count Days Between Two Dates in Excel

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What to Do When Excel's TRIM Function Doesn't Work

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Changing the Order of Operations in Excel Formulas

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Subtract Dates in Excel with the YEAR Function

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Excel Single Cell Array Formula

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Excel SIGN Function

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Finding the yintercept of a Parabola

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What Type of Mathematical Function Is This?