Expression 4: "x" equals 4 Has graph. To audio trace, press ALT+T.x=4
negative 10−10
1010
4
Expression 5: "g" left parenthesis, "x" , right parenthesis less than or equal to "y" less than or equal to "f" left parenthesis, "x" , right parenthesisgx≤y≤fx
5
Expression 6: "g" left parenthesis, "x" , right parenthesis greater than or equal to "y" greater than or equal to "f" left parenthesis, "x" , right parenthesisgx≥y≥fx