The equation of the y - axis is
(a) x = 0
(b) y = 0
(c) x = y
(d) x + y = 0
Equation of straight line is very simple x =o. In the entire y- axis ,wherever we go, always the x coordinate is zero. If we take any two points on x-axis and find equation using two point formula of straight line, then finally we will get x =o.
option a is correct