Ex 10.1, 12 - A line passes through (x1, y1) (h, k). If slope - Ex 10.1

  1. Chapter 10 Class 11 Straight Lines
  2. Serial order wise
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Ex10.1, 12 A line passes through (x1, y1) and (h, k) . If slope of the line is m, show that k โ€“ y1 = m (h โ€“ x1) . We know that slope of line passing through (x1, y1) and (x2, y2) is m = (๐‘ฆ_2 โˆ’ ๐‘ฆ_1)/(๐‘ฅ_2 โˆ’ ๐‘ฅ_1 ) So, Slope of line passing through (x1, y1) and (h, k) is Here x1 = x1 , y1 = y1 x2 = h , y2 = k Putting values m = (k โˆ’ y1)/(h โˆ’ x1) m(h โ€“ x1) = k โ€“ y1 k โ€“ y1 = m (h โ€“ x1) Hence proved

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