Jill bought a used motorcycle from a seller online for $1,200. The seller will charge her $5 a day to store the motorcycle at his house until she is able to pick it up. You can use a function to describe the total amount of money Jill will owe the seller if she waits x days to pick up the motorcycle. Write an equation for the function. If it is linear, write it in the form g(x)=mx b. If it is exponential, write it in the form g(x)=a(b)x.