Question

Question 19
The point of the term (a, -a) always lies on the line:

A) x = a
B) y = -a
C) y = x​​​​​​​
D) x + y = 0​​​​​​​

Answer 1

The answer is D.
Taking option (d),
x + y = a + (-a) = a - a = 0 [Since, point (a, -a) satisfies the equation]
Hence, the point (a, -a) always lies on the line x + y = 0.