Estimating Lines of Best Fit

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

What type of correlation does this scatter plot show?

• positive 

• negative

• no correlation

• nonlinear association

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x

• y = 30x

• y = 30x + 300

• y = (3/2)x + 300

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

• y = -25x + 170

• y = 25x + 170

• y = -(5/8) x + 170

• y = (5/8) x + 170

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• There is no line of best fit for this graph because there is no trend.