The annual enrollment of a university for the last nine years is recorded in the table. Year 1 2 3 4 5 6 7 8 9 Students (thousands) 9.5 8 8.5 7.5 6.5 6.5 8.5 8.5 9 What quadratic function best models this set of data?

15 batches are the most you can make

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be