Let x equal the age, in human years, for a dog that is 2 years old or older. for each of your chosen breeds, write an expression to model its age in dog years. [hint: use (x -2) in each expression.]

For the answer to the question above asking to write an expression to model its age in dog years for a dog that is 2 years old or older. If x is equal to human age 
then the dog is 2 years older
X = human years
x + 2 =  is for the dog age

Iknow one of the answers is a and maybe b but not 100% sure about b