PSSA 8th Grade Review #4

The manager of a movie theater collected data from customers who bought tickets to a comedy or an action movie on whether or not they purchased popcorn at the theater. The two-way table shows the data collected.

Which correlation does the two-way table suggest?

Lesson 9-3

• None of the correlations listed are correct.

• Customers who buy tickets to the comedy tend to buy popcorn.

• Customers who buy tickets to the comedy tend to not buy popcorn.

• Customers who buy tickets to the action movie tend to buy popcorn.

Celia is training for a race and recorded her average speed on each of 6 laps.

Which of the following is true, based on the scatter plot?

Lesson 9-1 and 9-2

• There is a positive correlation between Celia's lap number and her lap speed.

• There is no correlation between Celia's lap number and her lap speed.

• There is both a positive and a negative correlation between Celia's lap number and her lap speed.

• There is a negative correlation between Celia's lap number and her lap speed.

A marina collected data from a group of people regarding whether or not they have a boat and whether or not they have a jet ski. The two-way table shows the data collected.

Which correlation does the two-way table suggest?

Lesson 9-3

• Those who have a boat tend to have a jet ski.

• Those who have a boat tend NOT to have a jet ski.

• Those who do not have a boat tend NOT to have a jet ski.

Which of the following is true, based on the scatter plot?

Lesson 9-1 and 9-2

• The larger the apartment, the less it costs to rent.

• There is no relationship between the size of the apartment and its monthly rent.

• The larger the apartment, the more it costs to rent.

• The more times a person moves, the more they pay in rent.

The owner of a food truck collected data on whether customers purchased tacos or a burrito and whether they chose chicken or beef for the meat. The two-way table shows the data collected.

Which correlation does the two-way table suggest?

Lesson 9-3

• Customers who purchase tacos tend to choose chicken.

• Customers who purchase a burrito tend to choose beef.

• Customers who purchase a burrito tend to choose chicken.

• None of the correlations listed are correct.

The scatter plot and a line of best fit show the relationship for 10 people between weight gain and the number of doughnuts eaten.

Which statement describes the relationship between weight gain and the number of doughnuts eaten?

Lesson 9-2

• There was a five pound increase in weight for every eight doughnuts eaten.

• The number of doughnuts eaten decreased with an increase of weight gain.

• A weight gain of more than five pounds was from less than four doughnuts eaten.

• There was an eight pound increase in weight for every five doughnuts eaten.

Which of the scatter plots shows the most accurate line of best fit?

Lesson 9-2

• W

• X

The graph shows a line of best fit for data collected on the amount spent by customers at a carnival.

The equation of the line of best fit is y = 1.25x + 5. What does the y-intercept represent?

Lesson 9-2

• the cost to spend five hours at the carnival

• the cost per hour spent at the carnival

• the total amount of time spent at the carnival

• the entrance fee to the carnival

Which of the scatter plots shows the most accurate line of best fit?

Lesson 9-2

• W

• X

Which of the following best describes the relationship between the variables on the scatter plot?

Lesson 9-1

• negative correlation

• positive correlation

• positive and negative correlation

• no correlation