Expression 21: "f" left parenthesis, "x" , right parenthesisfx
21
Expression 22: "g" left parenthesis, "x" , right parenthesisgx
22
Expression 23: polygon left parenthesis, "A" , "B" , "C" , "B" , right parenthesispolygonA,B,C,B
23
Expression 24: "y" equals "g" prime left parenthesis, "B" Subscript, 1 , Baseline , right parenthesis left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "g" left parenthesis, "B" Subscript, 1 , Baseline , right parenthesisy=g′B1x−B1+gB1