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. 15 calories per minute B. 4 calories per minute
    C. 60 calories per minute D. 40 calories per minute
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  3.   What is the constant rate of change shown in the graph?
   
    A. 65 mph B. 70 mph
    C. 130 mph D. 55 mph
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  4.   What is the constant rate of change shown in the graph?
   
    A. 3 B. 4
    C. 5 D. 6
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  5.   What is the constant rate of change shown in the graph?
   
    A. 150 feet per minute B. -150 feet per minute
    C. -15 feet per minute D. 15 feet per minute
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