A girl pays Rs 16 for 2 pens and 3 pencils.draw its graph.
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how we draw a graph on brainly
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Explanation:
Let the price of 1 pen be 'a'.
price of 1 pencil 'b'.
Thus,
⇒ cost of 2 pen + 3 pencil = 16
⇒ 2(a) + 3(b) = 16
⇒ 2a + 3b = 16
For graph:
when a = 2,
2(2) + 3b = 16
⇒ 3b = 16 - 4 = 12
⇒ b = 12/3 = 4
When pair is (2, 4).
when a = 8:
2(8) + 3b = 16
⇒ 3b = 16 - 18
⇒ b = 0/3 = 0
Another pair is (8, 0).
Draw a line joining these points on graph.
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