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Timed Test For
Least squares regression line basics
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Sample Problem
In order to earn a little extra money, Anna set up a lemonade stand on her block over the summer. Suspecting that there might be a relationship between the temperature and the amount of lemonade she sells, Anna recorded the day’s high temperature and the number of cups of lemonade she sold for $10$ days. After plotting her results, Anna noticed that the relationship between her two variables appeared fairly linear, so she used technology to calculate the equation of the least-squares regression line. Below is a scatterplot displaying the data she collected along with her least-squares regression line (LSRL). ![](web+graphie://ka-perseus-graphie.s3.amazonaws.com/01f03026ef4a9f4ad3e03ae4b84cefdf5bdac3f4) **Which of the following are features of Anna's LSRL?** [[☃ radio 1]]
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Duration
30 seconds
60 seconds (1 minute)
120 seconds (2 minutes)
180 seconds (3 minutes)
300 seconds (5 minutes)