Expression 3: "y" equals left brace, negative 1 less than or equal to "x" less than 0 : "v" plus "v" "y" Subscript, 0 , Baseline left parenthesis, "v" minus 1 , right parenthesis minus 1 , right brace Has graph. To audio trace, press ALT+T.y=−1≤x<0:v+vy0v−1−1