Expression 23: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesisy=m2x−D1
23
Expression 24: "y" equals "m" Subscript, 3 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesisy=m3x−C1
24
Expression 25: "m" Subscript, 2 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesis equals "m" Subscript, 3 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesism2x−D1=m3x−C1