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Find the value of x for which the points (x, -1), (2, 1) and (4, 5) are collinear. |
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Answer» The slope of the lines joining the points (x, -1) and (2, 1); (2, 1) and (4, 5) are same. \(\frac{1-(-1)}{2-x}= \frac{5-1}{4-2}\) \(\Rightarrow\) \(\frac{2}{2-x} = \frac{4}{2} \) \(\Rightarrow\) 2 - x = 1 \(\Rightarrow\) x = 1 |
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