1.   What is the constant rate of change between the quantities in the table?
   
    A. $5 per hour B. $10 per hour
    C. $40 per hour D. $1 per hour
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  2.   What is the constant rate of change between the quantities in the table?
   
    A. 60 calories per minute B. 15 calories per minute
    C. 40 calories per minute D. 4 calories per minute
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  3.   What is the constant rate of change shown in the graph?
   
    A. $5 per lawn B. $16 per lawn
    C. $20 per lawn D. $10 per lawn
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  4.   What is the constant rate of change shown in the graph?
   
    A. 2 lbs per person B. 0 lbs per person
    C. 1 lb per person D. 0.5 lb per person
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  5.   What is the constant rate of change shown in the graph?
   
    A. -150 feet per minute B. 15 feet per minute
    C. 150 feet per minute D. -15 feet per minute
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