Unit 5: Two Variable Statistics

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

What kind of trend is shown from this scatterplot?

(You should be looking at this in Desmos)

• positive correlation

• negative correlation

• none

• cannot be determined

A person travels by car. They record the miles driven in a data table. Calculate the linear regression equation of this data. (Desmos) Use y1~mx1+b

• y = 61.93x - 1.79

• y = -1.79x + 61.93

• y = 0.016x + 0.03

• y = 0.03x + 0.016

The table shown is comparing a person's foot length to their height in cm. What might the height of a person be with a foot length of 30 cm?

(Desmos)

• 185 cm

• 180 cm

• 190 cm

• 192 cm

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Tags

CCSS.HSF-LE.A.1B

Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits.
y=3x+10
What does the y-intercept of the graph of this equation represent?

• The monthly fee
• How much Rich pays per visit
• The number of times Rich goes to the gym
• The total cost at the end of the month

Tags

CCSS.HSF.LE.B.5

If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit?

• There is a weak, positive relationship
• There is a strong, positive relationship
• There is a weak, negative relationship
• There is a strong, negative relationship

Tags

CCSS.HSS.ID.C.8

Estimate the correlation coefficient for this scatterplot.

• r = 1.2
• r = 0.89
• r = 0
• r = -0.89

Tags

CCSS.HSS.ID.C.8

r=-0.30

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Which sentence describes the relationship shown on this scatterplot?

• As the temperature decreases, the number of visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the number of visitors increases, the temperature decreases. 
• No correlation between temperature and visitors

Tags

CCSS.8.SP.A.1