Enable the Analysis ToolPak
Go to File
Click Options
Click Add-ins
In Manage, select Excel Add-ins
Click Go
Check Analysis ToolPak
Click OK
Arrange your data in columns
Put the dependent variable in one column
Put the independent variable(s) in separate column(s)
Click the Data tab
Click Data Analysis
Select Regression
Click OK
Set the Input Y Range
Set the Input X Range
Check Labels if your ranges include headers
Choose an Output Range or New Worksheet Ply
Select any desired options
Click OK
Review the regression output
Check R Square
Check coefficients
Check p-values
Check standard error
Check residual output if needed