1.   What is the constant rate of change between the quantities in the table?
   
    A. $5 per hour B. $40 per hour
    C. $10 per hour D. $1 per hour
    Hint

  2.   What is the constant rate of change between the quantities in the table?
   
    A. -10 gal per minute B. -2 gal per minute
    C. 2 gal per minute D. -20 gal per minute
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  3.   What is the constant rate of change shown in the graph?
   
    A. 4 B. 5
    C. 3 D. 6
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  4.   What is the constant rate of change shown in the graph?
   
    A. $10 per lawn B. $5 per lawn
    C. $20 per lawn D. $16 per lawn
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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
    Hint