OG详解-OG6 数学1 Q5

Choice A is correct. It’s given that the variable y represents the height, in meters, of the object above the ground. The graph shows that the height of the object was increasing from x = 0 to x = 2, and decreasing from x = 2 to x = 4. Therefore, the height of the object was increasing for the entire interval of time from x = 0 to x = 2.
Choice B is incorrect. The height of the object wasn’t increasing for this entire interval of time, as it was decreasing from x = 2 to x = 4. Choice C is incorrect. The height of the object was decreasing, not increasing, for this entire interval of time. Choice D is incorrect. The height of the object was decreasing, not increasing, for this entire interval of time.