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Question

Find the value B, given that the line passing through the points (2,3) and (B,-1) is perpendicular to a line with slope 2.

A
-10
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B
10
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C
6
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Solution

The correct option is B 10
Since the line is perpendicular to the line with slope 2, the slope of the required line would be negative reciprocal of 2.

Slope of the required line =12
x y
2 3
B -1

Slope =13B2=12

4B2=12

B2=8

B=10

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