Correct answer will be marked brainlest

1/6 because 1 divided by 2 is 0.5 and 2 divided by 3 is about 0.6666 and if you add it together its 1/6

hope this helped!

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