lesson 4: plotting points on a grid. what are ordered pairs??? two numbers – x and y components...
TRANSCRIPT
What Are Ordered Pairs???
• Two numbers – X and Y Components• Show POSITION on a grid (4,3) (2,7) etc.• First # shows “X” position – Horizontal Distance• 2nd # “Y” position – Vertical Distance• ALWAYS write the x before the y!!!
Where Have You Used Grids Before?
• GPS Systems
• Maps
• Battleship???
- Use Co-ordinates to find other ships to destroy!!!
- Letter and # position (ordered pairs) ex) A,7
- Letter and # instead of two #s
Some Other Key Terms
• Plot
- To locate and draw on a co-ordinate grid
• Origin
- The starting point of a grid (more later)
• Vertex
- An endpoint on an object (ex: A square has 4)
Some Things to Remember…
• When a number has 0 as one of its co-ordinates, it will lie ON THE AXIS
- ex) 4,0 0,4
• Sometimes a letter on a grid can represent an ordered pair
- A “J” can represent (3,4) on a grid
What is the Distance Between Each Point?
• Along the X-axis?• Along the Y-axis?
* Hint: Count the “jumps” between each space
In Your Math Journals…
• Using words, numbers and/or pictures, how do you use ordered pairs to describe and locate points on a grid?
GAMES TIME!!!
Cartesian Plane Bingo!!!
• Choose 5 ordered pairs to plot on your grid
- If all of your pairs are called, you win a prize!!!
- Your co-ordinates can go from 0-4
Cartesian Plane Twister!!!
• Co-ordinates range from 0-7
- I (or sir) will pick an ordered pair for you
- You will spin the spinner and whatever body part it lands on, that’s what body part you put on the grid