.SAT 2010年1月的一道数学真题The scatterplot above shows airfares in relation to the flight distance,in miles,for the ten lowest-priced airfares from Baltimore.Based on the scatterplot,which of the following statements are true?I..II..III.The

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.SAT 2010年1月的一道数学真题The scatterplot above shows airfares in relation to the flight distance,in miles,for the ten lowest-priced airfares from Baltimore.Based on the scatterplot,which of the following statements are true?I..II..III.The

.SAT 2010年1月的一道数学真题The scatterplot above shows airfares in relation to the flight distance,in miles,for the ten lowest-priced airfares from Baltimore.Based on the scatterplot,which of the following statements are true?I..II..III.The
.SAT 2010年1月的一道数学真题
The scatterplot above shows airfares in relation to the flight distance,in miles,for the ten lowest-priced airfares from Baltimore.Based on the scatterplot,which of the following statements are true?
I..
II..
III.The slope,in dollars per mile,of the line of best fit for the data is negative .
没理解III 如果说要把每英里的价格求出来,那就只有一种变量,每办法组成一个y=kx+b的线 那还谈什么slope?

.SAT 2010年1月的一道数学真题The scatterplot above shows airfares in relation to the flight distance,in miles,for the ten lowest-priced airfares from Baltimore.Based on the scatterplot,which of the following statements are true?I..II..III.The
line of best fit 意思是“最适线”很有可能是把散点图中的点用一条直线表示其大致变化趋势,III说的应该是上述直线斜率是负的…