Lines of Best Fit from a Data

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

The equation of the trend line
is  y= 1/2x +1
How many laps can a bicycle
make around the park in
23 minutes?    

• 44 laps

• 12 1/2 laps

• 23 laps

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

Alisha made a scatter plot that compares the number of minutes the members of the basketball team played to the points each scored during a game. She drew a line of best fit as shown. Does her line of best fit accurately represent the data set?

• Yes

• No

• 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

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

TRUE OR FALSE: Data points that lie above the trend line should be about the same distance as data points below the trend line.

• True

• False

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

• Yes

• No

TRUE OR FALSE: A line of best fit must go through the origin.

• True

• False