1. Warm up r = -3 k = -3 x = 2 1. 12 – 6r = 2r + 36 2. 3k – 5 = 7k + 7
Solve
– 6r = 2r + 36
2. 3k – 5 = 7k + 7
3. 2(x + 4) = 6x
r = -3
k = -3
x = 2

2. Finish Test? Turn in HW?

3. Coordinate Plane
A coordinate plane is a plane with a grid.

4. Y- axis
X- axis

5. The point where the X & Y Axes intersect is the Origin

6. Quadrant II Quadrant I Quadrant IV Quadrant III
The X & Y Axes separate the plane into 4 Quadrants. The order is like the letter C.
Quadrant II
Quadrant I
Quadrant IV
Quadrant III

7. SIGNS of Each Quadrant
(–, +)
(+, +)
(–, –)
(+, –)

8. Tell what quadrant or axis the points lie.

9. Ordered Pair (5, 3) Y-Coordinate X-Coordinate
Used to locate a point on the coordinate plane.
Called the coordinates of the point.
Each point on a coordinate plane corresponds to exactly one ordered pair.
(5, 3)
X-Coordinate
Y-Coordinate

10. Give the ordered pairs for each of the points.

11. CW WS
Bunny Maze

12. The Distance Formula

13. 4. Find the distance between the points. Round to the nearest tenth.
3.2

14. D = 3.16 Example Use the distance formula to find the distance
between (1, 4) and (-2, 3). Round to the nearest hundredth.
D = 3.16

15. Example
Use the distance formula to find the distance between the points, (10, 5) and (40, 45). Round to the nearest hundredth.
D = 50

16. 3. Find the distance between the points. Round to the nearest tenth.
3.6

17. Find the distance. Round to the nearest hundredth.
(2, 0) and (8, -3)
(5, 8) and (-2, 3)
(-6, -2) and (-3, -5)
(7, 12) and (-7, -4)
(-1, 9) and (0, 7)
6.71
8.60
4.24
21.26
2.24

18. Workbook
page 211 #’s1 – 9,
Page 213 # 19