Ex 10.1, 14 - Consider given population and year graph. Find - Collinearity of 3 points by sliope

  1. Chapter 10 Class 11 Straight Lines
  2. Serial order wise
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Ex10.1, 14 Consider the given population and year graph. Find the slope of the line AB and using it, find what will be the population in the year 2010? The two points given are A (1985, 92) , B (1995, 97) Let plot a third point on line C (2010, y) Points A,B, C lie on the line So, A, B & C are collinear ∴ Slope of AB = Slope of BC We know that slope of a line through the points (x1, y1)(x2, y2)is m = (𝑦2 − 𝑦1)/(𝑥2 − 𝑥1) 7.5 = y – 97 7.5 + 97 = y y = 104.5 Hence population in the year 2010 will be 104.5 crores

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