Mr. Martinez is comparing the price of oranges from several different markets. Determine whether each market uses proportional or nonproportional pricing. Place a checkmark in the column for the correct type of relationship. Show your work. a: 5/3.50; 10/6.50; 15/9.00; 20/10.25

b: 5/3.25; 10/6.60; 15/9.75; 20/13.00

c: 5/3.75; 10/7.50; 15/11.25; 20/15.00

d: 5/65; 10/ 7.30; 15/ 20.80; 20/14.30

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