Solve the Problem $34 \mathrm {~g}$ Every Day, Chemotherapy Treatment Reduces the Size of the

Solve the problem.
-A tumor originally weighed $34 \mathrm {~g}$ . Every day, chemotherapy treatment reduces the size of the tumor by $2.49 \mathrm {~g}$ . Express the size of the tumor as a linear function of the number of days spent in chemotherapy then determine how much the tumor weighs after 5 days of treatment.

A) $W ( x ) = - 2.49 x + 34 ; 12.45 \mathrm {~g}$
B) $W ( x ) = 34 x - 2.49 ; 12.45 \mathrm {~g}$
C) $W ( x ) = - 2.49 x + 34 ; 21.55 \mathrm {~g}$
D) $W ( x ) = 34 x - 2.49 ; 21.55 \mathrm {~g}$