Expression 1: "f" left parenthesis, "x" , right parenthesis equals 220 minus "x" left brace, 0 less than or equal to "x" less than or equal to 220 , right brace Has graph. To audio trace, press ALT+T.fx=220−x0≤x≤220
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"f" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.fx