Line of Best Fit

Find the equation of the line of best fit for the given data (a)  

• y = 163.41x+1.49
• y =- 163.41x+ 4.19
• y =- 4.19x+163.41
• y = 4.19x -163.41

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.  (a)  

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

If Joe worked 30 hours, how much is he expected to earn? (a)  

• $600
• $200
• $1000
• $800

What is the type of correlation? (a)  

• Negative 
• no association
• positive 

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

• Graph A
• Graph B
• Graph C
• Graph D

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

Tags

CCSS.8.EE.B.5

• 617.51 miles

• 621.09 miles

• 100 miles

• 0.19 miles

Tags

CCSS.HSF.LE.B.5

Write the linear regression equation for the following data points. Round to the nearest hundredth.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

What type of association does this graph show? (a)  

• Positive
• negative
• none
• all of the above

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

• Yes
• No