为广大SATer带来SAT数学每日一练，考察一次函数的图像规律。配有答案，解析，众考生，慢慢练习吧。

　　Each year from 2007 to 2015, a group of people were selected at random and surveyed about their use of online radio. The survey asked respondents whether or not they listened to online radio in the last month. The scatter plot shown gives the results of the survey, where P represents the percent of respondents who reported listening to online radio and t represents years since 2007. Which of the following equations best models the relationship between t and P?

　　A.P=0.23t+18

　　B.P=t+20

　　C.P=2.3t+20

　　D.P=4.3t+18

　　答案：D

　　解析：

　　Choice D is correct.

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