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Math Grade 9 Math Matters it is all abou
- 1. Plotting Points In A Plotting Points In A Coordinate System Coordinate System
- 2. How Do You Plot Points? How Do You Plot Points? Before plotting points on Before plotting points on a graph, you first have to a graph, you first have to understand the X and Y understand the X and Y axis. axis. The X and Y axis are The X and Y axis are number lines that run number lines that run horizontally and vertically horizontally and vertically on the coordinate system. on the coordinate system. An example of a set of An example of a set of coordinates for a point is coordinates for a point is (5,2), which is marked (5,2), which is marked with the blue dot in the with the blue dot in the coordinate system on the coordinate system on the right. right.
- 3. The X Axis The X Axis The X axis is the The X axis is the horizontal number line horizontal number line of the graph. of the graph. The X axis is The X axis is numbered with numbered with positive coordinates positive coordinates on the right and on the right and negative coordinates negative coordinates on the left with zero in on the left with zero in the middle. the middle.
- 4. The Y Axis The Y Axis The Y axis is the The Y axis is the vertical number line vertical number line on the graph. on the graph. The Y axis is The Y axis is numbered with numbered with positive coordinates positive coordinates on the top and on the top and negative coordinates negative coordinates on the bottom of the X on the bottom of the X axis. axis.
- 5. 4 Quadrants 4 Quadrants The X and Y axis together form 4 different The X and Y axis together form 4 different quadrants. quadrants. The The first quadrant first quadrant is labeled with roman is labeled with roman numeral I. A point in the 1 numeral I. A point in the 1st st quadrant has both quadrant has both positive X and Y coordinates. positive X and Y coordinates. The The second quadrant second quadrant is labeled with roman is labeled with roman numeral II. A point in the 2 numeral II. A point in the 2nd nd quadrant has a quadrant has a negative X coordinate and a positive Y negative X coordinate and a positive Y coordinate. coordinate. The The third quadrant third quadrant is labeled with roman is labeled with roman numeral III. A point in the 3rd quadrant has numeral III. A point in the 3rd quadrant has both negative X and Y coordinates. both negative X and Y coordinates. The The fourth quadrant fourth quadrant is labeled with roman is labeled with roman numeral IV. A point in the 4 numeral IV. A point in the 4th th quadrant has a quadrant has a positive X coordinate and a negative Y positive X coordinate and a negative Y coordinates. coordinates. The green dot is the origin. The origin is where The green dot is the origin. The origin is where the X axis and the Y axis cross. The the X axis and the Y axis cross. The coordinates of the origin are (0,0) coordinates of the origin are (0,0)
- 6. Plotting The Point Plotting The Point How do you find the point (2,3) How do you find the point (2,3) within the coordinate system. within the coordinate system. The first number (in this case The first number (in this case 2) is the X coordinate. 2) is the X coordinate. The second number (in this The second number (in this case 3) is the Y coordinate. case 3) is the Y coordinate. This point would be 2 over on This point would be 2 over on the X axis and 3 up on the Y the X axis and 3 up on the Y axis. axis. The point (2,3) is labeled with The point (2,3) is labeled with a red dot in the coordinate a red dot in the coordinate system. system.
- 7. Maze Game Maze Game The Maze Game allows students to practice The Maze Game allows students to practice their point plotting skills by having them move a their point plotting skills by having them move a robot through a mine field to a specific point in robot through a mine field to a specific point in the coordinate system. They move the robot by the coordinate system. They move the robot by entering the coordinates of the point they want entering the coordinates of the point they want the robot to move next. To accomplish the the robot to move next. To accomplish the mission, you must move the robot to the desired mission, you must move the robot to the desired safe spot in the coordinate system (marked by a safe spot in the coordinate system (marked by a green point) without going over any mines. green point) without going over any mines. http://www.shodor.org/interactivate/activities/coo http://www.shodor.org/interactivate/activities/coo rds/index.html rds/index.html
- 8. Works Cited Works Cited Introduction to the Coordinate Plane Introduction to the Coordinate Plane and Coordinates Discussion and Coordinates Discussion; 4/19/04. ; 4/19/04. http://www.shodor.org/interactivate/discus http://www.shodor.org/interactivate/discus sions/fd2.html sions/fd2.html The x – y Plane – 1; 4/19/04. The x – y Plane – 1; 4/19/04. http://www.purplemath.com/modules/plane http://www.purplemath.com/modules/plane .htm .htm