Write the equation for the following relation. r = {(x, y): (2, 3), (4, 4), (6, 5), (8, 6), . .}

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

i'll be glad to : )