Expression 40: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis plus "E" Subscript, 2 , Baseliney=m1x−E1+E2
40
Expression 41: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "F" Subscript, 1 , Baseline , right parenthesis plus "F" Subscript, 2 , Baseliney=m2x−F1+F2
41
Expression 42: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis plus "E" Subscript, 2 , Baseline equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "F" Subscript, 1 , Baseline , right parenthesis plus "F" Subscript, 2 , Baselinem1x−E1+E2=m2x−F1+F2