Introduce the Cartesian coordinate system using all four quadrants (ACMMG143)
LO: To identify the properties of the Cartesian coordinate system
Know:
What a Cartesian plane is.
Numbers moving from left to right on the Cartesian plane increase in order.
Numbers moving from right to left on the Cartesian plane decrease in order.
Numbers moving upwards on the Cartesian plane increase in order.
Numbers moving downwards on the Cartesian plane decrease in order.
There are 4 quadrants on the Cartesian plane.
Co-ordinates in the form (x,y) indicates how many spaces to move across the x-axis (horiztonal) and up the y-axis (vertical).
Understand:
That points have coordinates (x,y) and they determine the location on the Cartesian plane.
Do:
I can locate a point on a Cartesian Plane.
The Cartesian Plane
As numbers move to the right on the x-axis, the numbers increase in size.
As the numbers move to the left on the x-axis, the numbers decrease in size.
As the numbers move up on the y-axis, the numbers increase in size.
As the numbers move down on the y-axis, the numbers decreasein size.
In quadrant1(top right), both numbers are positive.
In quadrant 2 (top left), the firstnumber is negative, but the second number is positive.
In quadrant 3 (bottom left), bothnumbers are negative.
In quadrant 4 (bottom right), the first number is positive, but the second number is negative.
Ordered Pairs (Co-ordinates)
An ordered pair is a pair of numbers which tell you where a point is on the Cartesian Plane.
The first number tells you the location on the x-axis (horizontal), then the second number tells you the location on the y-axis (vertical).
A phrase to help you remember is, “Along the Corridor, Up the Stairs.”
