Investigation 1 Variables and Patterns

What is the dependent variable?

• Day

• School food drive

• Number of cans collected

• There is no dependent variable

Describe the relationship between the number of laps raced and the cost.

• As the number of laps increases by 10, the number of laps increases by $12.

• As the number of laps increase by 5, the cost increases by $12.

• As the number of laps increase by 12, the cost increases by $10.

• As the number of laps increase by 10, the cost increases by $20.

What are the variables?

• Number of laps raced and cost

• Number of racers and cost

• Number of go-karts and cost

• Kartland and price packages

Where is the greatest increase of rental cost shown on the table? 

• From 10-15 bikes

• From 30-35 bikes

• From 5-10 bikes

• From 20-25 bikes

• A
• B
• C
• D

What is the independent variable?

• Tiger cubs

• Age (weeks)

• Expected body weight (kg)

• Pounds of cat food

Based on the graph, which of the following is the best estimate for the cost of 45 laps?

• $50

• $80

• $90

• $100

Based on the graph, which of the following statements is true?

• The cost of coffee increases at a constant rate of $1 for 2 pounds.

• The cost of coffee increases at a constant rate of $2 for 1 pound.

• As the number of pounds increase, the cost per pound decreases.

• As the number of pounds increase, the cost per pound increases.

Match the best (times, sales) graph with the following story:
The daily sales declined at a steady rate.

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Marcus is shopping for video games.  He can choose between two stores.  Maywood Video charges $60 per game, and Discount Super Store charges a one time membership fee of $30 plus $40 per game.   Which graph is shown here?

• Maywood Video

• Discount Super Store

• Neither