1.   What is the constant rate of change between the quantities in the table?
   
    A. 60 calories per minute B. 40 calories per minute
    C. 4 calories per minute D. 15 calories per minute
    Hint

  2.   What is the constant rate of change shown in the graph?
   
    A. 130 mph B. 55 mph
    C. 65 mph D. 70 mph
    Hint

  3.   What is the constant rate of change shown in the graph?
   
    A. 3 B. 6
    C. 4 D. 5
    Hint

  4.   What is the constant rate of change shown in the graph?
   
    A. 0.5 lb per person B. 0 lbs per person
    C. 1 lb per person D. 2 lbs per person
    Hint

  5.   What is the constant rate of change shown in the graph?
   
    A. 15 feet per minute B. -15 feet per minute
    C. 150 feet per minute D. -150 feet per minute
    Hint