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On the x-axis
the positive direction is to the right and the negative direction is to the left.
On the y-axis
the positive direction is up and the negative direction is down.
When writing an ordered pair, the order is very important.
The x-value always comes first, and the y-value always comes second. The variables in an ordered pair are written in alphabetical order.
is the first number in an ordered pair and it represents the location relative to the x-axis.
The vertical measure, which is the second number in an ordered pair.
The centre point of a number line (ground floor of a hotel, freezing point on a thermometer)
Quadrants are labeled as follows:
I = Right Upper Quadrant
A pair of numbers that can be used to locate a point on a coordinate plane.
The intercept b (little o), gives a starting value in y-units. It's the y^ - value when x = 0.
the point where the line crosses the x-axis
the point where the line crosses the y-axis
the rise of a line is the change in the vertical position, or the difference between the y-coordinates of two points on the line.
the run of a line is the change in the horizontal position, or the difference between the x-coordinates of two points on the line.