Linear Regression

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade.

• No relationship exists between the number of books students read and their English grades.

Tags

CCSS.HSF.LE.B.5

Which of these graphs matches a correlation coefficient of

r = -.44?

• 
• 
• 
• 

The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57
• f(x) = 5.57x + 25.05
• f(x) = -5.57x + 25.05
• f(x) = 5.57x - 25.05

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

The table shown is comparing a person's foot length to their height in cm. What is the correlation between foot length and height?

• strong; r = .99

• strong; r = .97

• weak; r = .38

• weak; r = .58

What kind of trend is shown from this scatter plot?

• strong positive

• strong negative

• none

• weak positive

Tags

CCSS.HSF-LE.A.1B

What is the line of best fit?

• f(x)= 5x+1.82

• f(x) = 4.2x + 1.1

• f(x)= 1.82x + 5.02

• f(x)= 1.1x + 4.2

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

A person travels by car. They record their miles driven in a data table. What is the line of best fit?

• y = 61.9x - 1.8

• y = 61.9x + 1.8

• y = -61.9x - 1.8

• y = -61.9x + 1.8

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

A person travels by car. They record their miles driven in a data table. What is the correlation coefficient?

• r = .99

• r = .95

• r = 61.9

• r = -1.7

What is the line of best fit for the data?

• y = .25x + 8.25
• y = 8.25x + .25
• y = x + 1

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What is the correlation coefficient for the table?

• 1
• -1
• .25
• 8.25