When you own a pet, there are one-time costs, such as a leash, and continuing costs, such as food. suppose the one-time costs for owning a small dog are $180, and the continuing costs are $400 per year which function models the average annual cost of owning a small dog for x years?

Average cost per year = 400 + 180/x

Step-by-step explanation:

Using the formula y=mx+b

We know that b is the y intercept or  initial value.  That would be the start up costs

m is the slope on costs each time x increases, that would be 400 per year

Costs = 400x + 180

To find the average cost per year, we need to divide by x

Average cost per year = (400x + 180)/x

                        = 400 + 180/x