b. What does the coefficient of the expression in part (a) represent?

the total amount (in dollars) the veterinarian is paid when one dog is adopted

the total cost (in dollars) of adopting x dogs

the total amount (in dollars) the animal shelter earns when x dogs are adopted

the total cost (in dollars) of adopting one dog

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To determine what the coefficient of the expression in part (a) represents, we need to examine the expression itself.

Let's say the expression in part (a) is represented as ax, where "a" is the coefficient and "x" represents the number of dogs being adopted.

The coefficient of the expression represents the constant factor that is multiplied by the variable (in this case, the number of dogs "x") in order to determine the total amount or cost.

Looking at the given options, the correct interpretation is the total cost (in dollars) of adopting x dogs.

Therefore, the coefficient of the expression in part (a) represents the total cost (in dollars) of adopting one dog.