2. The table represents a proportional relationship. a. Find the constant of proportionality.
d
с
N
6.28
3
9.42
5
LO
15.7
10
31.4
b. Write an equation in the form y=kx that represents the relationship in the
table. (Use d and c instead of x and y)
c. What is the value of c if d=14?
d. What is the value of d if c=18.84?

thus, the first answer choice, y = sec x, is the correct one

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

the answer is about 24 dollars