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What are the X and Y Axes? | Don't Memorise

we saw this example in the previous

video where we had to give this bench a

unique identity to give it a unique

identity we needed three things a

reference point a horizontal line and a

vertical line let's see how we actually

use these three things let this be our

reference point we draw a horizontal

line from this reference point then we

draw a vertical line which will be

perpendicular to this horizontal line we

will need some numbers to denote the

columns so we mark 1 2 3 4 and so on

in equal intervals similarly on the

vertical line we mark 1 2 3 4 with the

same interval length as we had on the

horizontal line there is no limit on the

numbers we can mark on the horizontal

and the vertical lines so we mark these

arrows at the end of the lines most

importantly the reference point will be

the number 0 now if we have any point in

the region we can easily give it an

identity based on the numbers we have

marked but wait what if the point is

here how would you give it an identity

it's simple we just extend this line to

the left and this line downwards let's

zoom out a bit and modify this diagram

slightly we draw the horizontal line

like this notice that it has arrows on

both it ends the vertical line is drawn

like this again with arrows at both its

ends we extended the horizontal line to

the left and the vertical line downwards

now no matter where you place the point

on the plane you will be able to give it

a unique identity we cannot keep calling

these lines horizontal and vertical

every time so we name them we generally

call the horizontal line x - X it is

also referred to as the horizontal axis

this or the x-axes instead of calling it

a line we use a more sophisticated term

called axis that's all and yes it is

commonly referred to as the x axis

similarly we call the vertical line y

dash why it is called the vertical axis

or the y axis and what do we call the

reference point we named it oh and it is

referred to as the origin but how do we

number this part and this part of the

axis we will cover that in another video