Which is the graph of the linear inequality y < 3x + 1? on a coordinate plane, a solid straight line has a positive slope and goes through (negative 1, negative 2) and (0, 1). everything to the left of the line is shaded. on a coordinate plane, a solid straight line has a positive slope and goes through (negative 1, negative 2) and (0, 1). everything to the right of the line is shaded. on a coordinate plane, a dashed straight line has a positive slope and goes through (negative 1, negative 2) and (0, 1). everything to the left of the line is shaded. on a coordinate plane, a dashed straight line has a positive slope and goes through (negative 1, negative 2) and (0, 1). everything to the right of the line is shaded.