Basic geometry and measurement
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.
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- 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)(42 votes)
- I wanna know how many people here really, really love Khan Academy. So please upvote this if you support Khan Academy (and you really mean it). I hope I'm not the only one who uses Khan Academy just because they're a learning geek. And if nobody upvotes this, I'm gonna think everybody just does Khan Academy just because their parents made them, and that everyone hates Khan Academy in secret. But I definitely love Khan Academy. Again, please upvote this if you DO support Khan Academy.(10 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.(7 votes)
- What is the definition of an ordered pair? Can it be any pair of numbers?(5 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.(2 votes)
- How would you use plot graphs for equations?(4 votes)
- y=mx+c is the equation to find a STRAIGHT LINE GRAPH.(3 votes)
- How would you use plot graphs for equations?(5 votes)
- 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)
- 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)
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.