Is there a math textbook full of real-life problems which a student is supposed to model by a function which he or she creates on its own?

Question

To motivate students in school to learn math functions, I wonder if there is some textbook full of problems which student is supposed to find a function which model this problem. Ideally, the textbook would also give the answer on how to get the solution right. I have found two such examples of the type of excercises I'm looking for here: https://socratic.org/questions/how-can-functions-be-used-to-solve-real-world-situations . But I would like more of these excercises and I can't find any colection of those on the internet. Do you have any tips on websites or textbooks?