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Two Variable Graphing Definitions.

Independent Variable

a value that doesn't depend on any others (it's just measured)

Ordered Pair

first number plotted on x axis, second # plotted on y axis

Scatter Plot

any graph of a set of points

Dependent Variable

a value that depends or changes based on another (the one you want to predict)


estimate a point on the line between given data points

Linear Relationship

a pattern in data points on a graph that can be drawn as a straight line


the point where the axes intersect

Break mark

shows there is a break in the measurements on either axis

X Axis

horizontal line at bottom of the graph labelled with name and measurements of the independent variable

Negative Correlation

as independent variables increase, the dependent variables decreases graph goes down and to the right

No Correlation

No pattern appears in the data-no line of best fit can be drawn because there is no relationship between the variables

Non-linear Relationship

a pattern in data points on a graph that can be drrawn as a curved line


words at the top of a graph that identify the two variables and/or their relationship


estimate a point on the line after extending it beyond the given points


a pattern in the data between the two variables (increasing or decreasing)


a piece of data that's bery different fromt the others

Line of Best Fit

smooth line drawn near or through points on a graph that shows a trend

First Difference

the difference between consecutive y values

Positive Correlation

as independent variable increases, the dependent variables also increases-graph goes up and to the right

Y Axis

vertical line at side of graph labelled with name and mearurements of the dependent variable

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