Mathematics>Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
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)?+5
B.y=-2(x+3)?+5
C.y=-1/3(x-3)?+5
D.y=-1/3(x+3)?+5
解析：