Question

Joseph borrowed a book from a library. The library charged a fixed rental for the book and a late fee for every day the book was overdue. The expression below shows the charges Joseph paid for the book when he returned it x days after the due date: 2 + 0.25x

Answer 1

the late fee per day for the book is the answer 

Answer 2

The fixed rental fee is $2 and a late fee of $0.25 per day is charged.

Linear equation

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the slope of the  line (rate of change) and b is the initial value of y.

Let y represent the total charge after x days pass the due date.

Given that:

y = 0.25x + 2

Hence the fixed rental fee is $2 and a late fee of $0.25 per day is charged.

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