Expression 5: "f" Subscript, "t" "a" , Baseline left parenthesis, "x" , right parenthesis equals "y" Subscript, 1 , Baseline plus "m" Subscript, 1 , Baseline left parenthesis, "x" minus "x" Subscript, 1 , Baseline , right parenthesisftax=y1+m1x−x1
5
Expression 6: prime "S" "l" "o" "p" "e" "o" "f" "f" left parenthesis, "x" , right parenthesis "a" "t" "x" equals "x" Subscript, 1 , Baseline′Slopeoffxatx=x1
6
Expression 7: "m" Subscript, 1 , Baseline equals "f" Subscript, "p" "r" "i" "m" "e" , Baseline left parenthesis, "x" Subscript, 1 , Baseline , right parenthesism1=fprimex1
equals=
17.5 4 5 217.5452
7
Expression 8: StartFraction, "y" Subscript, 2 , Baseline minus "y" Subscript, 1 , Baseline Over "x" Subscript, 2 , Baseline minus "x" Subscript, 1 , Baseline , EndFractiony2−y1x2−x1