Read the following SAT test question and then click on a button to select your answer.
6月官方Daily Practice 每日一练数学,点击进入
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
重点单词:
function ['fʌŋkʃən] n. 功能,函数,职务,重大聚会
equation [i'kweiʃən] n. 相等,方程(式), 等式,均衡
parabola [pə'ræbələ] n. [数]抛物线
multiple ['mʌltipl] adj. 许多,多种多样的
答案:D
解析:
Choice D is correct.
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