Why equation of x axis y =0 and equation of y axis x =0

Описание: Why equation of x axis y =0 and equation of y what is the equation of x axis and y axis, what is equation of x axis, what is the equation of x axis, what is equations of y axis, equation of y axis, equation of x axis, equations of lines parallel to x-axis and y-axis, what is equation of a line parallel to x axis, what is the equation of a line parallel to x axis, x axis and y axis, y axis and x axis, what is equation of x-axis, what is equation of y-axis, reflection over x and y axis, equations of x-axis y-axis lines parallel to these axisaxis x =0