Dynamic chart based on chosen radio button

The code below was done via the macro recorder. You need one for each button desired:

Sub btn1()
    ActiveSheet.ChartObjects("Chart 1").Activate
    ActiveChart.SeriesCollection(1).Select
    
    'select a line color for the graph
    
    With Selection.Border
        .ColorIndex = 8
        .Weight = xlThin
        .LineStyle = xlContinuous
    End With
    
    ActiveChart.ChartArea.Select
    ActiveChart.PlotArea.Select
    
    'specify the column with the data to be plotted: sheet1, row2, column2 to row 31 column 2 (ie, B2:B32)
    
    ActiveChart.SeriesCollection(1).Values = "=Sheet1!R2C2:R31C2"
    
    'assuming that the columns have titles, use the column header as the graph title
    
    ActiveChart.SeriesCollection(1).Name = "=Sheet1!R1C2"  ' <--- Row 1 Col 2 = B1
End Sub

Note that this code assumes you have already created your chart.

You can use the INDEX formula to populate a single series that is charted without the use of code.