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Slope of a Line

Slope of the ...

Question

Slope of the line passing through the points $P (1, - 1)$ and $Q (- 2, 5)$ is

A

2

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B

6

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C

- 2

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D

- 3

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Solution

The correct option is B $- 2$
$T h e g i v e n p o i n t s a r e P (x_{1}, y_{1}) = (1, - 1) a n d Q (x_{2}, y_{2}) = (- 2, 5) . W e k n o w t h a t t h e s l o p e m o f a l i n e p a s s i n g t h r o u g h t h e p o i n t s P (x_{1}, y_{1}) & Q (x_{2}, y_{2}) i s m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}} . ∴ T h e s l o p e m = \frac{5 + (- 1)}{- 2 - 1} = - 2. A n s - O p t i o n C .$

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