16.6 and 16.7 Scatter Plots

A student wants to find the perfect popping time for popcorn. Each time he pops a bag of popcorn, he records the length of time in the microwave and the number of unpopped kernels. He makes a scatter plot of the data. He puts time in seconds on one axis. Which data should be on the other axis?

• price of bag of popcorn

• number of unpopped kernels

• store where bag was bought

• amount of popcorn eaten

The scatter plot shows the relationship between the temperature and the number of water bottles sold at a soccer game.

You want to add a point on the scatter plot to show that 10 bottles of water were sold when the temperature was 38˚F. Where would you add this point to the scatter plot?

• bottom right

• top right

• top left

• bottom left

The scatter plot shows the relationship between the temperature and the number of water bottles sold at a soccer game.

Multi-Step

Suppose one bottle of water costs $1.50. When the temperature was 89°, how much money did people pay for water bottles?

• $123

• $87

• $105

• $70

A storekeeper recorded the number of snow shovels sold during weeks when it snowed. Which ordered pair would be plotted on a scatter plot of the data?

• (2, 6)

• (11, 19)

• (5, 25)

• (9, 12)

Sharmeen wants to find the least crowded time to visit the skating rink. She records the temperature outside and the number of skaters at the rink at that time. She makes a scatter plot of the data. She labels one axis “Number of Skaters.” Which data should be on the other axis?

• time of day

• number of skaters

• temperature outside

• location of the rink

The swim team coach recorded the number of hours each team member practiced each week and the number of ribbons the team member won at the swim meet. Which ordered pair would you plot on a scatter plot of the data?

• (10, 14)

• (2, 5)

• (8, 1)

• (9, 3)

The scatter plot shows the relationship between the number of hours a waiter worked and the amount of tips received.

You want to add a point on the scatter plot to show that a waiter earned $90 in tips when he worked 7 hours. Where would you add this point on the scatter plot?

• top left

• top right

• bottom left

• bottom right

The scatter plot shows the relationship between the number of hours a waiter worked and the amount of tips received.

Multi-Step

A waiter worked 4 hours and earned $8 an hour plus tips. How much did the waiter earn including tips?

• $92

• $68

• $32

• $60

The scatter plot shows the relationship between the number of hours a waiter worked and the amount of tips received.

Multi-Step

A waiter that worked 2 hours and a waiter that worked 5 hours combine their tip money for the day to buy a meal for their coworkers. How much money do they have to spend on the meal?

• $75

• $110

• $25

• $100

Molly collected data about the number of hours students studied and their scores on a test. The results are shown in the scatter plot. Which statement about the data is true?

• As study hours increase, test scores decrease.

• As study hours increase, test scores increase.

• As study hours increase, test scores stay the same.

• As study hours decrease, test scores increase.