ACC GRADED: Unit 4B Bivariate Data Study Guide

Which data will most likely show a positive correlation when graphed on a scatter plot?

• the amount of rainfall on Fridays

• the price of a car and the number of upgrades you add to it.

• the height of a candle and the amount of time the candle stays lit

• the temperature of a cup of hot chocolate and the length of time the cup sits on the counter

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CCSS.HSS.ID.B.5

Consider the scatter plot shown. Which of the following statements BEST describes the association?

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CCSS.6.SP.B.5C

CCSS.HSS.ID.A.3

Which of the following scenarios is NOT correct?

• There is a positive correlation between the number of shirts you buy and the total cost of the shirts.

• There is a negative correlation between the number of videos you have on your phone and the amount of storage available on your phone.

• There is no correlation between the number of toppings on your pizza and the total cost of the pizza.

• There is a positive correlation between the hours you study and the grades on your tests.

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CCSS.HSS.ID.C.9

The scatter plot shows the daily salaries of different people and the hours they work. The equation for the line of best fit is shown below, where s is the daily salary in dollars and h is the hours worked. s = 10h + 40 Which of these is a CORRECT interpretation of the slope of this line?

• The daily salary increases $20 for every additional hour worked.

• The daily salary increases $10 for every additional 40 hours worked.

• The daily salary increases $40 for every additional 10 hours worked.

• The daily salary increases $10 for every additional hour worked.

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CCSS.HSF.LE.B.5

The relationship between the number of bags of popcorn that are sold and the price per bag are graphed on a coordinate plane. Which scatter plot BEST represents the line of best fit for the set of data?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

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CCSS.8.SP.A.2

Ashley measured the total snow in her yard every 30 minutes after a snowstorm started. Use the scatter plot below to answer the question: Which of the following is the MOST reasonable equation for the line of best fit?

• y = -3/4x + 5

• y = -4/3x + 5

• y = 3/4x + 5

• y = 4/3x + 5

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CCSS.HSF.LE.B.5

Using the line of best fit, predict the amount of snow after six hours.

• 4.5

• 6.0

• 13.0

• 14.0

What is the y-intercept in the line of best fit? What does the y-intercept represent in the scatter plot?

• 5; the amount of snow on the ground after Ashley stopped recording the snowfall.

• 5; the amount of snow on the ground when Ashley began recording the snowfall.

• -5; the amount of snow on the ground after Ashley stopped recording the snowfall.

• -5; the amount of snow on the ground when Ashley began recording the snowfall.

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CCSS.HSF.LE.B.5

Which data will most likely show a negative correlation when graphed on a scatter plot?

• The number of hours it has been snowing and the amount of snow on the ground.

• The speed of a car and the time it takes to reach its destination.

• The time spent digging a hole and the depth of the hole.

• The number of copies made, and the amount of copy paper used.

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CCSS.HSS.ID.B.5

The scatter plot shows years of experience (x) and annual income (y) for surgical nurses in a New York City hospital. What is the most reasonable salary for a surgical nurse with 9 years of experience?

• $60,000

• $50,000

• $75,000

• $100,000