Which of the lines is the best fit for the data in each scatter plot? Explain your reasoning.

1.  

   

   A scatterplot. Horizontal, from 40 to 90, by 10's, labeled wins. Vertical, 0 to 5, by 0 point 5’s, labeled number of runs allowed per game. 27 dots trend linearly downward and to the right. A dashed, trending linearly upward to the right, a solid line trending linearly downward and to the right. Dot 1 at 42 comma 4 point 5, above solid line, dot 27 at 86 comma 1 point 6, on solid line. 13 dots above solid line, 12 dots below solid line. 16 dots below dashed line, 10 dots above dashed line.   

2.  

   

   A scatterplot. Horizontal, from 30 to 90, by 10's, labeled average score from 10 surveys. Vertical, 0 to 50, by 5’s, labeled average amount spent on dinner. 27 dots trend linearly upward and to the right. A dashed and solid line of best fit.  Dot 1 at 40 comma 17, dot 27 at 88 comma 40, with dashed line. Dashed line passes through 10 points, with remaining points above the line. Solid line passes through 4 points, with 10 points above the line and 13 points below the line.

3.  

   

   A scatterplot. Horizontal, from 50 to 75, by 5's, labeled price of crude oil per barrel. Vertical, 2 point 5 to 3 point 8, by 0 point 1’s, labeled cost of gas at local station.  27 dots trend linearly upward and to the right. A dashed and solid line of best fit. Dot 1 at 50 comma 2 point 5 at the bottom left end of the dashed line. Dashed line passes through 10 dots. Solid line passes thorugh 3 points, with 10 points below the line and 15 points above the line.  

4.  

   

   A scatterplot. Horizontal, from 0 to 70, by 10's, labeled number of floors. Vertical, 300 to 900, by 50’s, labeled height of building, feet. 27 dots trend linearly upward and to the right. A dashed and solid line of best fit. Dot 1 at 25 comma 319, Dot 27 at 60 comma 807, with solid line of best fit, passing through 5 additional points. Dashed line passes through 14 points.