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प्रश्न
Find the value of k: if the slope of the line passing through the points (3, 4), (5, k) is 9.
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उत्तर
Let P(3, 4), Q(5, k).
Slope of PQ = 9 …[Given]
∴ `("k" - 4)/(5 - 3)` = 9
∴ `("k" - 4)/2` = 9
∴ k – 4 = 18
∴ k = 22.
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