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## 6th grade

### Course: 6th grade > Unit 9

Lesson 1: Four quadrants- Points on the coordinate plane examples
- Plotting a point (ordered pair)
- Finding the point not graphed
- Points on the coordinate plane
- Points on the coordinate plane
- Quadrants of the coordinate plane
- Points and quadrants example
- Quadrants on the coordinate plane
- Coordinate plane parts review
- Graphing coordinates review

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# Plotting a point (ordered pair)

We're plotting an ordered pair on the x (horizontal) axis and y (vertical) axis of the coordinate plane. Created by Sal Khan and Monterey Institute for Technology and Education.

## Want to join the conversation?

- Whenever there's, like, (9,2), do you plot the 9 on the y axis, or the x axis?(85 votes)
- just think (x,y)(40 votes)

- What if the ordered pair is (-1, 0)? Then what quadrant is it in?(6 votes)
- If a point is on an axis, it is not considered to be in a quadrant. You would say that the point is on the x axis.(6 votes)

- How would you use plot graphs for equations?(5 votes)
- What is the definition of an ordered pair? Can it be any pair of numbers?(4 votes)
- An ordered pair, as is typically meant in beginning algebra
*(though there are some more advanced meanings you'll get into later)*, is the x and y coordinates of a point, stated in that order. Thus, (3,4) is the ordered pair representing the point at x=3 and y=4. (4,3) is not the same, that is the point at x=4 and y=3.

Though you won't see this right away, "ordered pair" can be used to refer to any set of two numbers that have to be put in a specific order in order.(1 vote)

- How do you plot (3/2,7/2) on a graph?(4 votes)
- Change each improper fraction to a mixed number or decimal.

(3/2,7/2) is (1 1/2, 3 1/2) or (1.5, 3.5)

Hope this helps.(2 votes)

- what if a number is a negative and it was also on the y or x axis?(3 votes)
- I know that in the video Sal is plotting a point, but why does he call it an"ordered pair?"

What even*is*an ordered pair!?(4 votes)- An ordered pair is exactly what it sounds like. No fancy language involved. Just 2 numbers on a number line put together in a pair that tells a location on a coordinate grid.(1 vote)

- How would you use plot graphs for equations?(3 votes)
*y=mx+c*is the equation to find a STRAIGHT LINE GRAPH.(3 votes)

- The X co-ordinate of a point gives its distance from Y axis, and the Y co-ordinate of the point gives its distance from X axis.

Isn't this weird ?(3 votes) - What are "ordered pairs"? Ordered how? And what are pairs? Are they talking about the x and y axis or the point on the plane?(3 votes)
- Basically the set of (x,y) points in a plane satisfying some conditions are know as ordered pairs(2 votes)

## Video transcript

Plot the ordered pair
6, comma negative 8 into the coordinate plane. So this is a coordinate
plane right over here. The horizontal axis
here, this is the x-axis. The vertical axis
here is the y-axis. And the convention, when we
get an ordered pair like this, is that the first coordinate
is the x-coordinate, and the second coordinate
is the y-coordinate. So they're telling us that
we have an x-coordinate of 6. That means we count
up 6 on the x-axis. So let's count up 1. I could even write it down--
1, and then we have 2. That's right there. Then we have 3. Then we have 4. Then we have 5. And then we've moved
up 6 along the x-axis. We started at the
origin, at 0, 0. That's the origin. And we moved 6 to the right. That's this part
right over here. Now, our y-coordinate
is negative 8. That means we move down 8
in the vertical direction. So we can see it
right over here. So this right here, I'll
just do that every two. So this is down 1. This right here is
negative 2, negative 3. This right here is negative
4, negative 5, negative 6, negative 7, negative 8. So we move to the right 6,
and then we move down 8. We move to the
right 6, and then we move down 1, 2, 3,
4, 5, 6, 7, and 8. And we are right over there. So that is the point
, 6 negative 8. You could also look
at it this way. The x-coordinate is 6. So you move 6 there. And so we're going to be along
this line right over here. And then you can go, and then
the y-coordinate is negative 8. So you go down to negative 8. And you say, we're going to
be along this line over here. And the place that they
intersect is this coordinate. The easiest way I'd
like to think of it, move 6 to the right,
move along the x-axis, and then move along in
the vertical direction along the y-axis. So you go down 8.