1. PRE-ALGEBRA

2. Lesson 1-10 Warm-Up

3. PRE-ALGEBRA Lesson 1-10 Warm-Up

4. PRE-ALGEBRA “The Coordinate Plane” (1-10) What is the coordinate plane and how do you graph coordinates on it? coordinate plane (also called a grid): two number lines that intersect (cross) at right angles x-axis: the horizontal number line y-axis: the vertical number line origin (means “beginning”): the point at which the two number lines cross quadrant (means “one of four parts”): one of the four sections made by the intersection of the two axes ordered pair: two numbers called the x-coordinate and y-coordinate that that identify the location of a point on the coordinate plane The x-coordinate tells you how far to move right (+) or left (-) from the origin and the y-coordinate tells you how far to move up (+) or down (-) from the origin.

5. PRE-ALGEBRA Identify the coordinates of each point. Point A is 2 units to the right of the y-axis. The x-coordinate is 2. Point A is 3 units below the x-axis. The y-coordinate is –3. The coordinates of point A are (2, –3). b. B Point B is 2 units to the left of the y-axis. The x-coordinate is –2. Point B is 1 unit above the x-axis. The y-coordinate is 1. The coordinates of Point B are (–2, 1). a. A The Coordinate Plane LESSON 1-10 Additional Examples

6. PRE-ALGEBRA Graph point P(–3, 2 ) on a coordinate plane. 1 2 The Coordinate Plane LESSON 1-10 Additional Examples

7. PRE-ALGEBRA How do you name a point on a grid? How do you graph a point on a grid? Always start at the origin. Then, count the number of units (jumps) right (+) or left (-) to identify the x – coordinate. From there, count the number of units up (+) or down (-) from the x-axis to identify the y – coordinate Example: Name the following coordinate. Start at the origin. Move 2 units to the left (x = -2). Then move 3 units down (y = -3). The coordinates of z are (-2, -3) Example: “The Coordinate Plane” (1-10)

8. PRE-ALGEBRA In which quadrant or on which axis would you find each point? a. (5, 3) Since the x-coordinate is positive and the y-coordinate is positive the point is in Quadrant I. b. (0, –7) Since the x-coordinate is 0, the point is on the y-axis. The Coordinate Plane LESSON 1-10 Additional Examples

9. PRE-ALGEBRA Plot and label each point on a coordinate plane. Connect the points with lines. The figure is a rectangle. Graph a figure with vertices M(–3, 3), N(–3, –2), P(1, 3), and R(1, –2). Name the figure. The Coordinate Plane LESSON 1-10 Additional Examples

10. PRE-ALGEBRA Draw a coordinate grid. Graph each point. 1.S(2, 3) 2. T(2, –3) 3.U(–2, 3)4. K(0, –3) 5. L(3, 0) 6. Graph a figure with vertices A(–1, 4), B(3, 4), C(2, –1) and, D(0, –1), Name the figure. Lesson Quiz LESSON 1-10 The Coordinate Plane 1–5