Someone plz explain me with this limit equation

How can constraints be used to model a real-world situation?

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.

A11 gram sample of a substance that’s used to treat thyroid disorders has a k-value of 0.1247