Students in Mrs. Curry's class recorded the amount of snowfall in January and February.

Question

Snowfall in January (inches)
5, 3, 7, 1, 8, 4, 3, 6, 1, 5, 8


Snowfall in February (inches)
8, 4, 2, 6, 6, 3, 8


The class then made line plots of this data, but they made some mistakes. Which are mistakes the students made? Select all that apply.

A line plot named "Snowfall in January" shows a number line from one to eight inches. The number line is divided into seven equal parts. One has two dots. Three has two dots. Four has one dot. Five has two dots. Six has one dot. Seven has one dot. Eight has one dot. A second line plot named "Snowfall in February" also shows a number line from one to eight inches. The number line is divided into seven equal parts. Two has one dot. Three has one dot. Four has one dot. Six has two dots. Seven has one dot. Eight has two dots.

(1 point)
Responses

There should be 2 dots above 8 in the line plot of January's snowfall, not 1 dot.

There should be 2 dots above 8 in the line plot of January's snowfall, not 1 dot.

There should be 1 dot above 2 in the line plot of January's snowfall, not 2 dots above 1.

There should be 1 dot above 2 in the line plot of January's snowfall, not 2 dots above 1.

There should only be 7 dots in total in the line plot for February's snowfall, not 8 dots.

There should only be 7 dots in total in the line plot for February's snowfall, not 8 dots.

There should be no dot above 7 in the line plot of January's snowfall, not 1 dot.

There should be no dot above 7 in the line plot of January's snowfall, not 1 dot.

The difference between the greatest and least snowfall in January should be 3 inches, not 7 inches.

Answer 1

Let's break down the provided data and see what might be incorrect in the students' line plots for January and February.

Data for January (inches): 5, 3, 7, 1, 8, 4, 3, 6, 1, 5, 8

• Counts for each snow amount:
  • 1: 2 dots
  • 3: 2 dots
  • 4: 1 dot
  • 5: 2 dots
  • 6: 1 dot
  • 7: 1 dot
  • 8: 2 dots

The bullet points about January's snowfall:

• There should be 2 dots above 8 in the line plot of January's snowfall, not 1 dot. (True)
• There should be 1 dot above 2 in the line plot of January's snowfall, not 2 dots above 1. (False, since there is no snowfall of 2 inches)
• There should be no dot above 7 in the line plot of January's snowfall, not 1 dot. (False, there is 1 dot above 7 inches)
• The difference between the greatest and least snowfall in January (8 inches - 1 inch) should actually be 7 inches, not 3 inches. (False)

Total dots for January is correct from the data.

Data for February (inches): 8, 4, 2, 6, 6, 3, 8

• Counts for each snow amount:
  • 2: 1 dot
  • 3: 1 dot
  • 4: 1 dot
  • 6: 2 dots
  • 8: 2 dots

The bullet points about February's snowfall:

• There should only be 7 dots in total in the line plot for February's snowfall, not 8 dots. (False, since the total is correct at 7 dots)

Summary of mistakes:

1. There should be 2 dots above 8 in the line plot of January's snowfall, not 1 dot. (Correct mistake)

For the other options, they are either false or irrelevant since the data and calculations were done correctly. The correct mistakes are:

• There should be 2 dots above 8 in the line plot of January's snowfall, not 1 dot.