1.   What is the constant rate of change between the quantities in the table?
   
    A. -20 gal per minute B. -10 gal per minute
    C. -2 gal per minute D. 2 gal per minute
    Hint

  2.   What is the constant rate of change between the quantities in the table?
   
    A. 40 legs per dog B. 4 legs per dog
    C. 4 dogs per leg D. 2 legs per dog
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  3.   What is the constant rate of change shown in the graph?
   
    A. 65 mph B. 70 mph
    C. 55 mph D. 130 mph
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  4.   What is the constant rate of change shown in the graph?
   
    A. $5 per lawn B. $16 per lawn
    C. $10 per lawn D. $20 per lawn
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  5.   What is the constant rate of change shown in the graph?
   
    A. -15 feet per minute B. -150 feet per minute
    C. 15 feet per minute D. 150 feet per minute
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