Terms
Data Table - A list of x-values and their corresponding y-values.
Negative Slope - y always decreases when x increases and y always increases when x decreases.
Ordered Pair - A pair of numbers in a specific order. For example, (3, 7) and (8, - 1) are ordered pairs. Two ordered pairs are equivalent if their first members are equal and their second members are equal. However, the order of the two numbers is important; (1, 2) is not equivalent to (2, 1).
Origin - The point (0, 0).
Parallel Lines - Two lines are parallel if they have the same slope. Parallel lines, when extended, do not intersect at any point.
Perpendicular Lines - Two lines are perpendicular if their slopes are opposite reciprocals of each other. Perpendicular lines intersect each other at right angles.
Positive Slope - y always increases when x increases, and y always decreases when x decreases.
Slope - Given two points
(x1, y1) and
(x2, y2) on a line, the slope of the line is equal to:
m =  |
|
x-axis - The horizontal axis of a graph, with which the x-values are plotted.
x-coordinate - The number which corresponds to the value of x in an ordered pair.
x-intercept - The point at which the graph of a line crosses the x-axis. The point at which y = 0.
xy-graph - A two-dimensional way of representing points.
x-values are plotted with the horizontal axis, and
y-values are plotted with the vertical axis.
xy-graph
xy-graph
y-axis - The vertical axis of a graph, with which the y-values are plotted.
y-coordinate - The number which corresponds to the value of y in an ordered pair.
y-intercept - The point at which the graph of a line crosses the y-axis. The point at which x = 0.
