Question

Question 46(i)
The cost of a notebook is Rs. 10. Draw a graph after making a table showing cost of 2,3,4..... notebooks. Use it to find the cost of 7 notebooks.

Answer 1

Let, x be number of notebooks
and y be the cost of a notebook

$\begin{array}{ccccccccc}x& 1& 2& 3& 4& 5& 6& 7& 8\\ y& 10& 20& 30& 40& 50& 60& 70& 80\end{array}$



The cost of 7 notebooks is equal to the ordinate of the point (7,70), i.e. cost of 7 notebooks=Rs. 70