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Question
Use the graphical method to find the value of k, if:
(k, -3) lies on the straight line 2x + 3y = 1
Solution
2x + 3y = 1
⇒ 3y = 1 - 2x
⇒ y = `(1 - 2x)/(3)`
The table for 2x + 3y = 1 is
| X | - 1 | 2 | 5 |
| Y | 1 | - 1 | - 3 |
Plotting the above points in a graph, we get the following graph:
From the above graph, it is clear that k = 5
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