If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

## Basic geometry and measurement

### Course: Basic geometry and measurement>Unit 7

Lesson 3: Points in all four quadrants

# 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?
• just think (x,y)
• What if the ordered pair is (-1, 0)? Then what quadrant is it in?
• 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.
• What is the definition of an ordered pair? Can it be any pair of numbers?
• 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.
• How would you use plot graphs for equations?
• y=mx+c is the equation to find a STRAIGHT LINE GRAPH.
• How would you use plot graphs for equations?
• How do you plot (3/2,7/2) on a graph?
• 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.
• what if a number is a negative and it was also on the y or x axis?