(a) the cost of 7 notebooks. |
(b) the number of notebooks that can be purchased for Rs. 50. |
Answer:
Let x: number of notebooks y: cost of a notebook
x 1 2 3 4 5 6 7 8 y 10 20 30 40 50 60 70 80 (a) The cost of 7 notebooks is equal to the coordinate of the point (7, 70), i.e. cost of 7 notebooks = Rs. 70 (b) The number of notebooks that can be purchased for Rs. 50 is equal to the abscissa of the point (5, 50). Hence, 5 notebooks can be purchased for Rs. 50.
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