Expression 30: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis Has graph. To audio trace, press ALT+T.y=m1x−E1
30
Expression 31: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "G" Subscript, 1 , Baseline , right parenthesis Has graph. To audio trace, press ALT+T.y=m2x−G1
31
Expression 32: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "G" Subscript, 1 , Baseline , right parenthesism1x−E1=m2x−G1