Question

The cost of the milk per litre is $15$. Draw the graph for the relation between the quantity and cost. Hence find :
i) the proportionality constant.
ii) the cost of $3$ litres of milk.

Answer 1

Let $x$ de 642073_605178_ans_5f2e84439f394cfe9bed4358e7b80a5f notes Quantity of milk (in litre)
$Y$ denotes the cost of milk (in Rs.)

x	1	2	3	4	5	6	7
y	15	30	45	60	75	90	105

The proportionality constant $K=15$
The cost of $3$ litres of milk $=45$