Expression 27: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesis plus "C" Subscript, 2 , Baseliney=m1x−C1+C2
27
Expression 28: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis plus "E" Subscript, 2 , Baseliney=m2x−E1+E2
28
Expression 29: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesis plus "C" Subscript, 2 , Baseline equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis plus "E" Subscript, 2 , Baselinem1x−C1+C2=m2x−E1+E2