Expression 20: "f" left parenthesis, "x" , right parenthesis equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis Has graph. To audio trace, press ALT+T.fx=m1x−E1
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Expression 21: "g" left parenthesis, "x" , right parenthesis equals "m" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.gx=m2x
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Expression 22: "f" left parenthesis, "F" Subscript, 1 , Baseline , right parenthesis tilde "g" left parenthesis, "F" Subscript, 1 , Baseline , right parenthesis Has regression. To access statistics, press Tab.fF1~gF1