The general equation or standard equation of a straight line is:
Where and are constants and either or .
Putting in the above standard equation of a line, we have
This shows that the line is passing through the point .
Since we have , by squaring
Since the equation of a straight line in symmetric form is
Now we put in the standard equation of symmetric form, and we have
This is the equation of a line in symmetric form transformed from its general form or standard form of a straight line.