Point of form (a,-a) always lies on line

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4. Linear Equations in Two Variables

easy

The point of the form $(a,-a)$ always lies on the line

A

$x+y=0$

B

$y=-a$

C

$x=a$

D

$y=x$

Solution

The point of the $(a,-a)$ have $x$ and $y$ coordinate of opposite signs.

So, the points of the form $(a,-a)$ always lie on the line $y=-x,$ l.e., $x+y=0$

Standard 9

Mathematics

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