1. Lesson 2.8 The Coordinate Plane
Essential Question: How do you identify and plot points in a coordinate plane?

2. Before we start…
What is the length and width of the rectangle?

3. What is the coordinate plane?
A plane that is made by the intersection of two number lines, a vertical line, the y-axis, and the a horizontal line, the x-axis.

4. What is the origin?
The point where the x-axis and y-axis meet.

5. What is a quadrant?
One of the four regions that is formed when the x and y-axis are drawn in the coordinate plane.

6. −3,2 What is an ordered pair? x y
A point in the coordinate plane, where the first number is the x-coordinate and the second number is the y-coordinate. x y
−3,2

7. How do you identify a point in the coordinate plane?
Determine how many units
left or right of the origin the point is located for the x-coordinate.
above or below the origin the point is located for the y-coordinate.

8. Name the points in the coordinate plane

9. Name the points in the coordinate plane

10. Name the points in the coordinate plane

11. Name the points in the coordinate plane.

12. How do you plot points in a coordinate plane?
Begin at the origin and move to the right if the x-coordinate is positive and left if negative
Then move up if the y-coordinate is positive or down if negative.

13. Plot the point in a coordinate plane.
B (3, -2)
C (0, -4)

14. Plot the point in a coordinate plane.
B (1, 3)
C (0, 6)

15. Plot the point in a coordinate plane.
B (-2, 4)
C (6, -3)

16. Plot the point in a coordinate plane.
B (6, 7)
C (5, -4)

17. Plot the point in a coordinate plane.
B (3, -4)
C (1, 2)

18. Plot the point in a coordinate plane.
B (5, 0)
C (0, 0)

19. Plot the point in a coordinate plane.
B (-2, -5)
C (4, 3)

20. Find the perimeter and area of the rectangle.

21. Find the perimeter and area of the rectangle.

22. Plot the points and find the perimeter and area.
7,−2 , 7,3 , −1,3 , −1,−2

23. Plot the points and find the perimeter and area.
−5,6 , 2,6 , 2,0 , −5,0

24. How do you identify and plot points in a coordinate plane?

25. Ticket Out the Door
Give the coordinates of Point A on the coordinate plane.