Graph the parabola.y=-3x-24x-42Plot five points on the parabola: the vertex, two points to the left of the vertex, and two points to the right of

Graph the parabola.y=-3x²-24x-42Plot five points on the parabola: the vertex, two points to the left of the vertex, and two points to the right of the vertex. Then click on the graph-a-function button.