Vitor Duarte Teodoro, April 2009

Organize a table for computations...

Data for linear fitting These columns accept 100 pairs (x, y)Note: columns G to L use function ISNUMBER()

Some details (I)

Some details (II)

Some details (III)

Formulas used for computations

Making an appropriate graph...

Note the details of the graph...

The graph and all computations change with new data

Be carefull when deleting data to introduce new values!

Excel has a powerful function for linear regression: LINEST

Important: LINEST is an array formula...

LINEST

An example using LINEST

Excel also has a Data Analysis Toolpak

Using the Data Analysis Toolpak

And the output is... But this output is not interactive