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Variable

an alphabetic character representing a number, called the value, which is either arbitrary or not fully specified or unknown. It is usually a letter like x or y.

Relationship

What we have when one variable depends on another.Cause and effect between 2 varibles.

Coordinate Graph

A picture of a relationship using one axis for each variable.

data

A collection of information gathered for a purpose. Data may be in the form of either words or numbers.

table

Shows a relationship by listing the data for the two variables in pairs.

plotting points

Taking data from a table and putting the points onto a graph.

Equation

A mathematical sentence that contains an equals sign

scale

The numbers we choose to put along the axis of a graph.

internal

The difference or jump between two numbers.

X Variable

Independent or explanatory variable

Y Variable

Dependent or response variable

x axis

The horizontal axis on a coordinate graph, for the varaible that controls the other (an axis ia a line on a graph)

Formula

An equation that relates two or more quantities

coordinate pair

A pair of numbers telling where a point lies on a graph it is always (x,y)

linear

A relationship that graphs as a straight line. This means y is changing at a constant enterval.

Proportional

A relationship where y doubles whenever x doubles. in other words, we can scale up or down.