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Question

The ratio in which the line segment PQ, where P (-5, 2) and Q (2, 3), is divided by the y-axis is


A

6:5

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B

3:5

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C

7:2

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D

5:2

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Solution

The correct option is D

5:2


All points on Y-axis can be expressed as (0, y) where y is the y-coordinate of the point.

Therefore, let the point of intersection of Y-axis and line PQ be R(0, y).

Let the ratio in which the line segment PQ is divided by point R be k:1.

Applying section formula, we get

0=2k+1(5)k+1

2k5=0

k=52

The required ratio is 5 : 2.


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