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Chapter 3: Problem 84

How many points are needed to graph a line? How many should actually be used? Explain.

Short Answer

Expert verified
You need at least two points to graph a line, as a line in a two-dimensional space is defined by two points. However, using more than two points is recommended for greater accuracy and error checking.

Step by step solution

01

Understand the properties of a line

A line in a two-dimensional space is defined by the linear equation y = mx + b where m is the slope of the line and b is the y-intercept. This means that for every x-value, there is a corresponding y-value.
02

Determine the minimum points

To graph a line, at least two points are needed. These two points could be any two points on the line. After determining the coordinates of these two points (x1, y1) and (x2, y2), these points can be plotted on the graph.
03

Discuss the number of points to be used

Although two points are sufficient to graph a line, it is often advisable to use more than two points, especially when dealing with more complex equations. More points allow for greater accuracy in the graph and can help identify if there are any errors or unusual behaviors in the data.

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