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Linear Graphs

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Linear Graphs - Lesson Summary

Linear graph:
A linear graph is different from a line graph. In a linear graph, the set of points on the graph line up in an orderly manner.  A linear graph is a graph that consists of a single straight line segment.



Cartesian System:
When draw a graph, first start with two straight lines at right angles to each other. The horizontal line is called the x-axis of the graph. The vertical line is called the y-axis of the graph. The x-axis and the y-axis together are called the axes of the graph. The intersection point of the axes is called the origin. Generally, the origin is denoted by the letter O.

Coordinates
The position of a point that we draw on the graph is indicated by a pair of numbers with in brackets these are called the coordinates of the point.

 

The graph of a proportional relationship results in a linear graph. A proportional relationship is expressed as an equation containing two variables.

An independent variable can have any value. A dependent variable’s value is determined by the independent variable.

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