Find the regression lines for the men’s and women’s data.
Select the men’s data and put it as input in calculator then press STAT button then select EDITING.
Now input year data in column and men’s time in column.
For regression line press STAT go to CALC menu, and select
The display shows slope intecept form of line,
Apply similar method for women’s data and get regerssion line as,
Hence, the regression line are,
Sketch both regression lines on the same graph.
Let graph the lines in viewing rectangle with the help of graphing calculator, then set the viewing window to then we set .
Now evaluate intercepts with CALC “intercept”
Now graph of lines will be,
Hence, both regression lines on the same graph is plotted.
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