A delivery service charges a base fee for the first pound of a package and a different rate for each additional pound. The total cost , in dollars, for a package weighing pounds is modeled by the function , for . Which of the following statements is true?
The base fee for the first pound is $1.75.
The cost for each additional pound is $4.25.
The base fee for the first pound is $6.00.
The cost for each additional pound is $6.00.
