The vertex of the parabola in the day-plane above is (0,c). which of the following is the tru about the parabola witg the equation y=-a(x-b)^2+c? a.) the vertex is (b, c) and the graph opens upward. b.) the vertex is (b, c) and the graph opens downward. c.) the vertex is (-b, c) and the graph opens upward. d.) the vertex is (-b, c) and the graph opens downward.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.