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प्रश्न
A line passes through (x1, y1) and (h, k). If slope of the line is m, show that k – y1 = m (h – x1).
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उत्तर
The slope of the line passing through (x, y) and (h, k) is `(k - y_1)/(h - x_1)`
It is given that the slope of the line is m.
`("k" - "y"_1)/("h" - "x"_1) = "m"`
= k – y1 = m(h – x1)
Hence, k – y1 = m(h – x1)
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