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Graphing a Line Parallel to a Given Line Through a Specific Point
To visually graph a line that runs parallel to a given line and passes through a specific coordinate point, leverage the property that parallel lines share the exact same slope. First, determine the slope of the original given line (for instance, if the given line is , its slope is ). Because the lines are parallel, the new line will adopt exactly the same slope, denoted as . Second, plot the explicitly given point on the coordinate plane (for example, ). Finally, starting from that newly plotted dot, apply the slope by counting out its corresponding rise and run (a rise of and a run of in this specific example) to locate a second valid point. Drawing a straight line extending through these two plotted points visually constructs the parallel line before any formal algebraic equation is calculated.
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Intermediate Algebra @ OpenStax
Ch.3 Graphs and Functions - Intermediate Algebra @ OpenStax
Algebra
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