Question

Meg has already saved $110 toward a new phone. To earn the rest of the money she needs, she starts a dog-walking business and charges $12 each time she walks a dog. You can use a function to describe how much money she will have saved in total after x dog walks.
Write an equation for the function. If it is linear, write it in the form f(x)=mx+b. If it is exponential, write it in the form f(x)=a(b)x.

Answer 1

This is linear since she adds the same amount per walk.

f(x) = 12x + 110

(where x = number of dog walks, m = 12 dollars per walk, b = 110 dollars initial savings).