备考SAT考试,官方指南对于大家的指导帮助更大。因此对于初次备战考试的同学来说,大家首先要熟读OG中的资料内容,尤其是指南中的真题练习和解析,对于大家的帮助更大,具体的这部分真题内容是什么呢?下面小编为大家整理了详细的内容,供大家参考!

  The mean number of students per classroom, y, at Central High School can be estimated using the equation y = 0.8636x + 27.227, where x represents the number of years since 2004 and x 10. Which of the following statements is the best interpretation of the number 0.8636 in the context of this problem?

  A. The estimated mean number of students per classroom in 2004

  B. The estimated mean number of students per classroom in 2014

  C. The estimated yearly decrease in the mean number of students per classroom

  D. The estimated yearly increase in the mean number of students per classroom

  Content: Heart of Algebra

  Key: D

  Objective: You must interpret the slope of an equation in relation to the real-world situation it models. Also, when the models are created from data, you must recognize that these models only estimate the independent variable, y,for a given value of x.

  Explanation: Choice D is correct. When an equation is written in the form y = mx + b, the coefficient of the x-term (in this case 0.8636) is the slope.

  The slope of this linear equation gives the amount that the mean number of students per classroom (represented by y) changes per year (represented by x).

  以上就是关于“SAT OG数学真题练习”的内容,希望通过上述内容的学习,大家能够更好的来练习这部分的真题,预祝各位考生能够取得高分成绩。


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