16.1 and 16.2 Dot Plots

You are making a dot plot to show the data. Which numbers will you put on the number line for the dot plot?

• 6.5, 6.6, 6.7, 6.9, 7.0, 7.1

• 6.7, 6.8, 6.9, 7.0, 7.1, 7.2

• 6.6, 6.7, 6.8, 6.9, 7.0, 7.1

• 6.5, 6.6, 6.7, 6.8, 6.9, 7.0

How many dots will you mark above 7.1?

• 4

• 3

• 2

• 1

Multi-Step

The go-cart race officials realize that 3 ants in the race should be disqualified. What happens to the dot plot if 3 of the ants with a time of 6.8 miles per hour are removed?

• The tallest stack of dots will be above 7.1.

• The tallest stack of dots will be above 6.6.

• The number of speeds plotted on the dot plot will change to 15.

• The dot plot remains the same.

Sandy has 12 recipes for trail mix. The amount of peanuts in each recipe in cups is 5/8 , 3/8 , 3/8 , 7/8 , 7/8 , 5/8 , 3/8 , 3/8 , 7/8 , 7/8 , 5/8 , and 5/8 . Sandy makes a dot plot of the data. Which numbers will she put on the number line?

• 3/8 , 4/8 , 5/8 , 6/8

• 3/8 , 4/8 , 6/8 , 7/8

• 4/8 , 5/8 , 6/8 , 7/8

• 3/8 , 4/8 , 5/8 , 6/8 , 7/8

The heights of the girls in Leila’s class to the nearest 1/2 inch are: 56 1/2 , 57, 56 1/2 , 58, 58, 57 1/2 , 57 1/2 , 57, 58 1/2 , and 57. Leila makes a dot plot of the data. How many different heights will be included on the number line?

• 10

• 5

• 3

• 9

A geologist measures the mass of some rocks to the nearest tenth of a gram and makes a dot plot of the data. The masses are: 5.3, 5.5, 5.6, 5.4, 5.4, 5.3, 5.8, 5.7, 5.8, 5.5, 5.5, and 5.3 grams. She lists two numbers on the number line. How many more numbers will she put on the number line?

• 2

• 3

• 4

• 5

Which numbers will you put on the number line for the dot plot?

• 7.8, 7.9, 8.0, 8.1, 8.2

• 7.9, 7.8, 8.1, 8.2, 7.8

• 7.9, 8.1, 8.2, 8.3, 8.4

• 7.8, 7.9, 8.1, 8.2, 8.3

Which number will not have any dots marked above?

• 7.8

• 8.0

• 8.1

• 8.2

Multi-Step

What is the difference between the total number of dots and the number of dots above the number with the most dots?

• 10

• 9

• 8

• 14

Multi-Step

The paleontologist measures the fossils again and finds two errors. Two fossils with a length of 7.9 centimeters instead measure 8.1 and 8.2 centimeters. Which two numbers will have the same number of dots?

• 7.8 and 7.9

• 8.0 and 8.2

• 7.8 and 8.1

• 7.9 and 8.1