Vocabulary
The horizontal number line in a coordinate plane
What is the x-axis
The quadrant where both x and y numbers are poistive
What is quadrant I
Plot the point (3,2). Which direction do you move first?
Move right 3, then up 2
What are the coordinates of a point 4 units to the right, and 3 units up?
(4,3)
True or false: (0,4) lies on the y-axis
True
What is the y-axis
In this quadrant, x is negative and y is positive.
What is quadrant II
Plot (-4,1). Where does the point end up?
Left 4, up 1
A point is 2 left, and 5 up.
(-2,5)
Which axis does (-3,0) lie on?
The x-axis
A pair of numbers that tells where a point is located.
What is an ordered pair
If a point has the coordinates (-4, -7), which quadrant is it in?
What is quadrant III
Plot (2,-3)
Right 2, down 2
A point is 6 right, and 1 down
(6,-1)
If a point moves from (2,3) to (2,-3), what changed?
The y value changed signs, it reflected off the x axis
The point where the x-axis and y-axis cross
What is the origin
What is quadrant IV
Plot (-5,-2)
Left 5, down 2
A point is 2.5 left and 0.5 up.
(-2.5, 0.5)
A point is reflected across the y axis. (5,-2) becomes what?
(-5,-2)
Numbers that can be written as fractions, such as 1/2, 3/4, or 2.
What are rational numbers
A point has a positive x-value and a negative y-value. Which quadrant is it in?
Quadrant IV
Plot the point (-2,-4).
What two moves do you make?
Left 2, down 4
A point is 5 units to the right and 2 units down.
What are the coordinates?
(5,-2)
True or false: Any point with a 0 as one of its coordinates lies on an axis.
True