Given the equation y=−x2+2x+48 with solutions of x=−6 and x=8 , which of the following identifies the general shape of its associated graph?(1 point) Responses The graph crosses the x-axis at x=−6 and x=8 . The graph crosses the x -axis at x equals negative 6 and x equals 8 . The vertex is to the left of the y-axis. The vertex is to the left of the y -axis. The graph has the shape of a straight line. The graph has the shape of a straight line. The graph opens upward.