F(x) = -4x^2 + 12x - 9

answer: the equation matches the regression

step-by-step explanation:

the answer is d

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#12 the answer is the third option

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