Expression 2: "y" equals left brace, 0 less than or equal to "x" less than or equal to 3 : StartFraction, "f" left parenthesis, 3 , right parenthesis minus "f" left parenthesis, 0 , right parenthesis Over 3 , EndFraction times "x" plus "f" left parenthesis, 0 , right parenthesis , right bracey=0≤x≤3:f3−f03·x+f0
2
Expression 3: "y" equals left brace, 0 less than or equal to "x" less than or equal to 3 : "f" left parenthesis, 0 , right parenthesis , right bracey=0≤x≤3:f0
3
Expression 4: "x" equals left brace, "f" left parenthesis, 0 , right parenthesis less than or equal to "y" less than or equal to "f" left parenthesis, 3 , right parenthesis : 3 , right bracex=f0≤y≤f3:3