The line that most closely approximates the data in a scatter plot.
Constant of Variation
The number k in equations of the form y = kx.
An equation of the form y = kn, where k ≠ 0.
Family of Graphs
Graphs and equations of graphs that have at least one characteristic in common.
The use of a linear equation to predict values that are OUTSIDE the range of data.
The use of a linear equation to predict values that are INSIDE of the data range.
Line of Fit
A line that describes the trend of the data in a scatter plot.
In a scatter plot. as X increases, Y decreases.
Lines tin the same plane that never intersect and have the same slope.
The simplest of graphs in a family of graphs.
Lines that meet to form right angles.
An equation to the form y-y = m (x - x₁), where M is the slope and (x₁,y₁) is a given point on a non vertical line.
In a scatter plot, as X increases, Y increases.
Rate of Change
How a quantity is changing over time.
Two sets of data plotted as ordered pairs in a coordinate plane.
The ratio of change in the y-intercept (rises) to the corresponding change in the x-intercept (run) as you move from one point to another along a line.
An equation of the form y = mx+b, where M is the slope and B is the y-intercept.
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