Expression 28: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesis plus "D" Subscript, 2 , Baseliney=m1x−D1+D2
28
Expression 29: "y" equals StartFraction, negative 1 Over "m" Subscript, 1 , Baseline , EndFraction left parenthesis, "x" minus "M" Subscript, 1 , Baseline , right parenthesisy=−1m1x−M1
29
Expression 30: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesis plus "D" Subscript, 2 , Baseline equals StartFraction, negative 1 Over "m" Subscript, 1 , Baseline , EndFraction left parenthesis, "x" minus "M" Subscript, 1 , Baseline , right parenthesism1x−D1+D2=−1m1x−M1