Fit the Line Scatter

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

Which line is the best fit for the data?

• 
• 
• 
• 

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.

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

Which equation best represents the data?

•  y = 3/4x + 1

•  y = 4/3x - 1

•  y = -3/4x - 1

•  y = -4/3x - 1

Which equation best represents the data?

•  y = 3/4x + 1

•  y = 4/3x - 1

•  y = -3/4x - 1

•  y = -4/3x - 1

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

• Yes

• No

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

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