Question

what is the equation of y axis

Answer 1

Equation of straight line is verysimple y =o. In the entire x axis ,wherever we go, always the y coordinate is zero. If we take any two points on y axis and find equation using two point formula of straight line, then finally we will get x =o. This is the way to show or prove equation of y axis as x =o.

Answer 2

The equation for the Y-axis is ( X=0 ) every point that lies on the Y axis will look like (0,1) (0,4) ( 0,3).

        Sometimes we call these points Y -intercepts.