Expression 3: StartRoot, 4 minus left parenthesis, "x" , right parenthesis squared , EndRoot plus 9 Has graph. To audio trace, press ALT+T.4−x2+9
3
Expression 4: "x" equals left brace, 0 less than "y" less than 1 , right brace positive left bracket, negative 7 , 5 , right bracket Has graph. To audio trace, press ALT+T.x=0<y<1+−7,5
4
Expression 5: "x" equals left brace, 9 less than "y" less than 11 , right brace minus 1 Has graph. To audio trace, press ALT+T.x=9<y<11−1