Line of Best Fit Practice

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

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

Tags

CCSS.HSF.IF.B.4

What would be the correlation between study time and test grades?

• positive
• negative
• none
• cannot be determined

Tags

CCSS.HSF-LE.A.1B

This measures how strong or weak the relationship between 2 quantitative variables are.

• Scatter Plot

• Causation

• Correlation

• Line of best fit

Tags

CCSS.HSF-LE.A.1B

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Tags

CCSS.HSF-LE.A.1B

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• 1.409

• .6864

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What is the line of best fit?

• f(x)= 5x+1.82
• cannot be determined
• f(x)= 1.82x + 5.02
• f(x)= 1.1x + 4.2

Tags

CCSS.8.EE.B.5

Find the equation of the line of best fit for this table.

• y = -2.28x + 51.08
• y = 51.08x - 2.28
• y = 0.06x - 0.26
• y = -2.28x - 0.26

Tags

CCSS.HSS.ID.B.6

CCSS.HSA.CED.A.2

CCSS.HSS.ID.C.7

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

• y = 1.5x + 12
• y = 12x + 1.5
• y = 0.67x - 8
• y = -8x + 0.67

Tags

CCSS.8.EE.C.8C

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

Tags

CCSS.HSS.ID.B.6

CCSS.HSA.CED.A.2

CCSS.HSS.ID.C.7