Question

A lending library has a fixed change for the first three days and an additional charge for each day thereafter. A man paid Rs. 27 for a book kept for 7 days. If the fixed charge is Rs. x and per day charge is y. Write the linear equation representing the above information. Also, draw the graph of this equation.

Answer 1

Rs x = Fixed charge for the three first days
Rs y = additional charge for each day

Rs 27 = x + (7-3) * y       =>     x + 4 y  = 27

y = 27/4 - x / 4

Answer 2

Rs 27 = x + (7-3) * y  =>  x + 4 y  = 27

y = 27/4 - x / 4