OG详解-OG7 数学2 Q3

Choice C is correct. The vertex of the graph of a quadratic function in the xy-plane is the point at which the graph is either at its minimum or maximum y-value. In the graph shown, the minimum y-value occurs at the point (0, 2).
Choice A is incorrect. The graph shown doesn’t pass through the point (0, -2). Choice B is incorrect. The graph shown doesn’t pass through the point (0, -3). Choice D is incorrect. The graph shown doesn’t pass through the point (0, 3).