Answer :

John paid Rs. 27 for a book kept for seven days. If the fixed charges be Rs. x and subsequent per day charges be

Rs. y

⇒ x + 4y = 27 is the equation.

For graph, we’ll first make the table of solutions by putting some random values of x and thereafter we’ll find corresponding values of y and then we’ll plot these points on graph, join them and extend them in straight line to find the graph.

(Note: ∵ equation is linear graph will always be straight line.)

Table of solutions for the given equation-

GRAPH:

Now, from the graph if the fixed charge is Rs. 7 the subsequent per day charge is Rs. 5 (pt. E)

and if the per day charge is Rs. 4, then the fixed charge is Rs. 11. (pt. F)

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