每日一题

Mathematics

A quadratic function is graphed in the xy-plane. The vertex of the parabola is at (-3,5) and the parabola crosses the y-axis at (0,2). Which of the following could be the equation for the function?

A.y=-2(x-3)2+5
B.y=-2(x+3)2+5
C.y=-1/3(x-3)2+5
D.y=-1/3(x+3)2+5

答案和解析

答案：D

解析：

Choice D is correct.