Select the correct answer from each drop-down menu.
Sarah is expanding her landscaping business. She currently has three regions in which she provides landscaping services, and intends to increase that by two regions every month. Each region begins with eight clients, and she intends to increase the number of clients by three every month.

The estimate for the total number of clients is given by the expression below, where x is the number of months after Sarah begins the expansion.

Use the information given to determine how best to complete the following sentences.

The constant of the expression represents the .

The binomial (8 + 3x) is a factor of the expression, which represents the per .