Linear Functions and Scatter Plots

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

• Yes

• No

The equation of the trend line
is  y= 1/2x +1. Use the equation to determine the amount of time it would take to bike 20 laps. 
*Look at the x and y axis first before starting the problem
   

• 38 minutes

• 11 minutes

• 41 minutes

• 10 minutes

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles? 

• 50 min

• 80 min

• 45 min

• 60 min

Based on this scatter plot, a student with 6 absences should get approximately what score on the final exam? 

• ≅ 58

• ≅ 92

• ≅ 100

• ≅ 76

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 sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

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

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

• A

• B

• C

• D

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15 

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