Let’s Learn!

Think About It!

Goal: Collect data and create graphs.

Maria measured her classmates in inches. Here is her data:

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

Maria wants to organize her data in groups. Let’s make tally marks for students who are 46-48 inches tall, 49-51 inches tall, 52-54 inches tall, and 55-57 inches tall.

Table of inches and tally marks. 46-48 inches: 0, 49-51: 0, 52-54: 0, 55-57: 0.

How many students are 46-48 inches tall?

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

How many students are 49-51 inches tall?

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

How many students are 52-54 inches tall?

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

How many students are 55-57 inches tall?

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

Great job! Our tally chart is done. Now it is time to use the tally chart to make a bar graph. Bar graphs organize data using bars.

Empty bar graph for height of Maria's classmates.

What number will the bar above 46-48 line up with?

Table of inches and tally marks. 46-48 inches: 3, 49-51: 9, 52-54: 9, 55-57: 3.

How tall will the bar above 49-51 be?

What will the bar above 52-54 look like?

What number will the bar above 55-57 line up with?

We did it! This graph shows how tall Maria’s classmates are.

Bar graph for height of Maria's classmates. 46-48: 3, 49-51: 9, 52-54: 9, 55-57: 3.

Based on Maria’s data, how many classmates does she have?

47	54	49	50	48	57
53	55	53	52	53	57
50	48	53	49	52	49
49	53	51	54	49	50

Yes! There are 24 numbers in Maria’s data.

Maria has 24 classmates because there are 24 numbers in her data.

Questions answered correctly:

Questions answered incorrectly:

Learning Coach —

Objectives

Skills Needed

Materials Needed

Keywords

Learning Coach Notes

Let’s Learn!

Can you graph data?

Think About It!

Based on Maria’s data, how many classmates does she have?

Summary