Question

The following table gives the cost and number of notebooks bought.

No.of note books $x$	$2$	$4$	$6$	$8$	$10$	$12$
Cost Rs.$y$	$30$	$60$	$90$	$120$	$150$	$180$

Find the cost of seven note books

Answer 1

According to the given table,

The relation between the number of notebooks $x$ and Cost $Rs.y$ will be

$y=15x$

So, the cost of $7$ notebooks

$y=15\times 7=Rs.105$

Hence, this is the answer.