In this video tutorial, Dev explains how to read stacked bar graphs using a survey of students' favorite pets. The video covers understanding graph titles, analyzing data for different periods, and calculating preferences for cats, dogs, and fish. The tutorial concludes with a summary and encouragement to apply the learned skills.

What is the primary purpose of a stacked bar graph?

• To highlight outliers in data

• To show trends over time

• To compare multiple groups of data

• To display individual data points

What does the blue bar represent in the graph?

• Period two

• All periods combined

• Period three

• Period one

What should you do first when analyzing any graph?

• Read the titles

• Count the bars

• Check the colors

• Calculate the totals

What is the significance of the green bar in the graph?

• It represents all periods

• It represents Period two

• It represents Period one

• It represents Period three

How many people in Period one like cats?

• Two

• Five

• Three

• Four

What is the correct calculation to find the number of people in Period two who like cats?

• 7 + 3

• 7 - 4

• 7 - 3

• 7 + 4

How many people in Period three like cats?

• Five

• Two

• Three

• Four

How many people in Period one like dogs?

• Five

• Three

• Two

• Four

What is the correct calculation to find the number of people in Period two who like dogs?

• 8 - 3

• 8 - 5

• 8 + 5

• 8 + 3

How many people in Period three like dogs?

• Four

• One

• Two

• Three