Expression 7: "m" equals StartFraction, left parenthesis, "y" Subscript, 2 , Baseline minus "y" Subscript, 1 , Baseline , right parenthesis Over left parenthesis, "x" Subscript, 2 , Baseline minus "x" Subscript, 1 , Baseline , right parenthesis , EndFractionm=y2−y1x2−x1
equals=
0.7 1 2 1 2 1 2 1 2 1 2 10.712121212121
7
Expression 8: "b" equals "y" Subscript, 1 , Baseline minus "m" "x" Subscript, 1 , Baselineb=y1−mx1