Expression 2: "y" equals 4 Has graph. To audio trace, press ALT+T.y=4
negative 10−10
1010
2
Expression 3: "f" left parenthesis, "x" , right parenthesis less than or equal to "y" less than or equal to 4 left brace, 0 less than or equal to "x" less than or equal to 1 , right brace Has graph. To audio trace, press ALT+T.fx≤y≤40≤x≤1