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