Find a Relation Between X and Y, If the Points A(2, 1), B(X, Y) and C(7,5) Are Collinear. - Mathematics

Find a relation between x and y, if the points A(2, 1), B(x, y) and C(7,5) are collinear.

Solution

Let A(x_1 =2,y_1=1),B (x_2 =x,y_2=y) and  C (x_3=7,y_3=5 be the given points .

The given points are collinear if

x_1 (y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)=0

⇒2(y-5)+x(5-1)+7(1-y)=0

⇒2y-10+4x+7-7y=0

⇒ 4x-5y-3=0

Hence, the required relation is 4x -5y-3=0

Concept: Area of a Triangle
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APPEARS IN

RS Aggarwal Secondary School Class 10 Maths
Chapter 16 Coordinate Geomentry
Q 19