Investigation 1 Variables and Patterns

What are the variables in the table

• (2, 20)

• Teachers

• Students

• (4,40)

• 10 students per teacher

What are the two variables on the graph?

• Population

• Years

• Bear Population in Emerald Forest

• The points on the graph

What are the variables in the table?

• 6 people per van

• Vans

• People

• 30 people for every 5 vans

The table shows the number of swimming teachers for different number of students.

Which describes the pattern in the table?

• multiply by 2

• multiply by 10

• add 10

• subtract 9

A soccer team and coaches are traveling in vans to a tournament. The table shows the number of people traveling in different numbers of vans.
Which describes the pattern in the table?

• Add 6

• Multiply by 4

• Multiply by 6

• Subtract 6

This graph shows how the temperature changed during an all-day hike by students in the Terrapin Middle School science club. When did the maximum temperature occur?

• At 2, 2.5 and 3.5 hours

• At 0 hours

• At 5 and 6 hours

• At 4 hours

A group of campers rented 4 rafts to ride down the Brazos River. The table shows the number of people that different numbers of rafts can hold.
How many people can 4 rafts hold?

• 40

• 42

• 32

• 36

The table below represents the total number of pencil top erasers in different numbers of packages.
Each package has the same number of erasers. What is the total number of erasers in 5 boxes?

• 67, because 72-5=67

• 36, because 2x18=36

• 9, because 81-72=9

• 45, because 5x9=45

This graph shows how the temperature changed during an all-day hike by students in the Terrapin Middle School science club. When was the temperature rising most rapidly?

• Between 3.5 and 4.0 hours

• Between 0 and 1.0 hours

• Between 1.0 and 1.5 hours

• Between 2.0 and 1.5 hours

This graph shows how the temperature changed during an all-day hike by students in the Terrapin Middle School science club. When was the temperature falling most rapidly?

• Between 3.5 and 4.0 hours

• Between 0 and 1.0 hours

• Between 5.0 and 5.5 hours

• Between 2.0 and 1.5 hours