1.   What is the constant rate of change between the quantities in the table?
   
    A. -20 gal per minute B. 2 gal per minute
    C. -10 gal per minute D. -2 gal per minute
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  2.   What is the constant rate of change between the quantities in the table?
   
    A. 40 calories per minute B. 4 calories per minute
    C. 60 calories per minute D. 15 calories per minute
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  3.   What is the constant rate of change shown in the graph?
   
    A. 70 mph B. 65 mph
    C. 130 mph D. 55 mph
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  4.   What is the constant rate of change shown in the graph?
   
    A. 6 B. 5
    C. 3 D. 4
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  5.   What is the constant rate of change shown in the graph?
   
    A. 1 lb per person B. 0 lbs per person
    C. 0.5 lb per person D. 2 lbs per person
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