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in Coordinate Geometry by (32.3k points)
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Find k, if B (k, -5), C (1, 2) and slope of the line is 7.

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B(x1, y1) = B (k, -5), C (x2, y2) = C (1, 2)

Here, x1 = k, x2 = 1, y1 = -5, y2 = 2

But, slope of line BC is 7. …[Given]

∴ 7 = 7/1 - k

∴ 7(1 – k) = 7

∴ 1 – k = 7/7

∴ 1 – k = 1

∴ k = 0

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