Expression 1: "f" left parenthesis, "x" , right parenthesis equals negative 71.5 5 left brace, 0 less than or equal to "x" less than or equal to 13.4 2 , right brace Has graph. To audio trace, press ALT+T.fx=−71.550≤x≤13.42
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Expression 2: "f" left parenthesis, "x" , right parenthesis less than or equal to "y" less than or equal to 0 Has graph. To audio trace, press ALT+T.fx≤y≤0