Final answer:
The relationship between the cost and the number of cookies is not proportional.
Step-by-step explanation:
The relationship between the cost and the number of cookies is not proportional. In a proportional relationship, the ratio between the cost and the number of cookies would remain constant. However, in this case, the price for 4 cookies is $3 and the price for 10 cookies is $6. Let's compare the ratios to see if they are equal:
For 4 cookies: $3/4 = $0.75
For 10 cookies: $6/10 = $0.6
Since the ratios are not equal, we can state that the relationship is not proportional.