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### Course: Class 9 (Foundation) > Unit 8

Lesson 1: Intro to the coordinate plane# Coordinate plane: graphing points

The video is all about understanding the basics of the coordinate plane. It explains how to plot points using ordered pairs, with the first number indicating the horizontal (x-axis) movement and the second number showing the vertical (y-axis) movement. Created by Sal Khan.

## Want to join the conversation?

- if you are asking why its (X,Y) its because x is before y in the alphabet(7 votes)
- In the ordered pair, does x always come before the y?(5 votes)
- In Algebra you'll learn that when you solve an expression or equation the variables in your answer should be in alphabetical order, so when doing coordinates just relate to this tip.

Hope this helps you a lot! :)(8 votes)

- What is a plot?(0 votes)
- A plot would be the 2 points you need to graph. He plotted (8, 10) and (6, 10) So he had two plots to graph.(21 votes)

- what are line plots(6 votes)
- Line plots is a graph that displays data as points or check marks above a number line, showing the frequency of each value.

Hope this helps!☺(2 votes)

- I thank you for all your time with this,if you didn't create this, I wouldn't be going to 6th grade.(5 votes)
- Good for you! I'm glad that this helped. It certainly helped me!(1 vote)

- does x always come before y??(4 votes)
- Yes, just like in the alphabet x always comes first, then y, then z if you are making a 3d model.(2 votes)

- Do you have to say # comma # or can you say and?(4 votes)
- The word “and” is not written between the coordinates of a point. A comma should be used between the coordinates.

Have a good day!(2 votes)

- how can i remember the "y" and the ''x'' side ... its to hard for my to remember(3 votes)
- Try this, think of "x" as the ground that you are standing on and "y" tells you if you are going up to the sky or falling in a hole. So "x" is straight across and "y" goes up and down. Like saying "Why am I Flying?" OR "Why did I fall in the hole?". Hope this helps. So when you see something like (6,8) you start on the ground (6) and then you fly up into the sky (8).(3 votes)

- what is a polt again? :>(3 votes)
- the point is so that someone like you can read maps and graphs(2 votes)

- What if it is negative 8(4 votes)

## Video transcript

We are asked to plot 8 comma 10. So the first number in
this ordered pair, this is our x-coordinate. This tells us how far do
we move in the x direction. It's a positive 8, so we
move 8 in the x direction. And then the second number
in our ordered pair is 10. That is our y-coordinate. That tells us how far we
move in the y direction. Since it's positive,
we move up 10. So we move up 10, all
the way over here. And you could have thought
about it either way. You could have said, hey,
look this is our y-coordinate. This is 10. So I could move up 10. And then my x-coordinate
is positive 8. So I'll move 8 along
the positive x-axis, or I'll move 8 to the right. You see right over
here I have moved 8 to the right-- 1,
2, 3, 4, 5, 6, 7, 8. And I have moved 10 up-- 1,
2, 3, 4, 5, 6, 7, 8, 9, 10. You might be tempted to
move 8 up and then 10 to the right, which
would put you there. But then you would have had
the two numbers mixed up. You would have had the x and
the y-coordinates mixed up. The 8 tells you how far to move
in the horizontal direction. The 10 tells you how far to
move in the vertical direction. Let's do a couple more of these. Plot 6 comma 10. Well once again, the first
number in the ordered pair is the x-coordinate, how far
we move in the x direction. So we move 6 to the right. And then the second
number, the 10, tells us our vertical
coordinate, our y-coordinate. So it's positive 10. So we move 10 up. Let's do one more-- 5 comma 7. So my horizontal coordinate is
5, so I move 5 to the right. And then my vertical one is
7, or my y-coordinate is 7. So I move 7 up-- 1,
2, 3, 4, 5, 6, 7. And as long as you remember
which one is horizontal and which one is vertical or
which one is the x-coordinate and which one is the
y, you should be fine. You could say, hey look,
this is my y-coordinate, 7. So I'm going to move 7 up. And my x-coordinate is 5, so I'm
going to move 5 to the right. And it will get you to
that exact same point. This specifies exactly one
point in the coordinate plane.