Linear Regressions

What letter do we use to represent correlation coefficient?

• c
• r
• p
• h

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

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.HSS.ID.B.6

CCSS.HSS.ID.C.7

The linear regression equation is y = 61.93x - 1.79.  Use the equation to predict how far this person will travel after 10 hours of driving.

• 10 miles
• 617.5 miles
• 0.19 miles
• 500 miles

Tags

CCSS.8.EE.C.8C

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

Estimate the correlation coefficient for this scatterplot.

• A) r = 1.2

• B) r = 0.89

• C)r = 0

• D) r = -0.89

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Estimate the correlation coefficient for this scatterplot.

• A) r = -0.9

• B) r = 1

• C) r = 0.9

• D) r = -1

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What kind of trend is shown from this scatter plot?

• strong positive

• strong negative

• none

• weak positive

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

Which one of these examples is NOT an example of CAUSATION?

• Kryptonite causes Superman to lose all his powers.

• Temperatures of less than 32˚F cause water to freeze.

• Umbrellas cause rainstorms.

• Stepping on the gas pedal causes a car to move faster.

Tags

CCSS.HSS.ID.C.9

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

• strong; r = .99
• strong; r = .97
• weak; r = .38
• weak; r = .58

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8