Decoding Bar Graphs: Scale and Survey Insights

The video tutorial teaches how to read and interpret bar graphs using examples from a third-grade classroom survey on favorite colors and a survey on pets. It explains how to determine the scale of a graph, analyze data, and answer typical questions such as finding differences and totals. The tutorial also highlights the importance of estimating when exact numbers are not clear.

What is the first step in analyzing data from a bar graph?

• Identify the highest bar

• Determine the scale

• Find the average value

• Count the number of bars

If the bar for green reaches up to 8 on the scale, how many students chose green as their favorite color?

• 4 students

• 8 students

• 16 students

• 2 students

Which color was the least popular among the students?

• Blue

• Red

• Green

• Purple

What is the difference in popularity between the most and least popular colors?

• 9 students

• 6 students

• 5 students

• 3 students

How many students liked purple more than red?

• 12 students

• 3 students

• 6 students

• 9 students

How many students were surveyed about their favorite color?

• 26 students

• 24 students

• 28 students

• 30 students

What scale is used in the bar graph about pets?

• Counting by 3s

• Counting by 2s

• Counting by 10s

• Counting by 5s

What is the estimated number of students who prefer cats?

• About 16 students

• About 10 students

• About 20 students

• About 25 students

How many more people have dogs than horses according to the pets bar graph?

• 10 more

• 20 more

• 5 more

• 15 more

What total number of students were surveyed in the pets bar graph?

• 68 students

• 80 students

• 72 students

• 76 students