Line of Best Fit

Which statement best explains whether the trend line is a good fit for the data?

• The trend line is NOT a good fit for the data because there is an outlier.

• The trend line is a good fit for the data because it passes through two of the data points.

• The trend line is a good fit for the data because the data represents a positive association, and the line has a positive slope.

• The trend line is NOT a good fit for the data because most of the points are below the trend line.

A group of friends recorded the time it took to ride their bikes around the park.  This scatter plot shows their results with the line of best fit.  Which is closest to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

Based on the line of best fit for the scatter plot, which of the following amounts is closest to the cost of a 120-minute phone call?

• $10

• $12

• $15

• $20

Which line is the best fit for the data?

• 
• 
• 
• 

• y = 1.45x + 22
• y = -2x + 15
• y = 1.33x + 30
• y = -1.5x + 24

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

In order to show that a line of best fit may be appropriate for a data set, what should be true about scatter plot?

• The points should form an upward curve.

• The points should be scattered randomly.

• The points should appear to generally lie along the line.

• The points should form one line above the x-axis and another below it.