if the abscissa and the ordinate are the same(not equal to zero)where will be point lie??

Dear Student,

We have some coordinates that have abscissa and ordinates same : ( 1, 1 ) ( 2 , 2 ) , ( 3 , 3 ) ( - 1 , - 1 ) , ( - 2 , - 2 ) , ( - 3 , - 3 ) .

And we plot these points on xy  plane , As :

So we can say that these points lies on the line passing through origin with angle of 45$°$ from x axis or y axis .