Question

A photocopy store charges $Rs1.50per$ copy for the first $10$ copies and $Rs1.00per$ copy after the $10th$ copy. Let $x$ be the number of copies, and let $y$ be the total cost of photocopying.
(i) Draw graph of the cost as $x$ goes from $0$ to $50$ copies.

Answer 1

Given that there are ${}^{\prime }{x}^{\prime }$ copies and $y$ us the total cost of photocopying

$y=\{Rs.1.5x;0<x\le 10$

$\{Rs.(1.5\times 10+1.(x-10));x>10$

$y=\{Rs.1.5x;0\le x\le 10$

$\{Rs.(5+x);x>10$

$\therefore$ Graph will be, for $xϵ[0,50]$