Graph each line. Give the domain and range. -x + 5 = 0
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2. Graphs of Equations
Lines
Problem 41
Textbook Question
Find the slope of the line satisfying the given conditions. through (2, -1) and (-3, -3)
Verified step by step guidance1
Recall that the slope \(m\) of a line passing through two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by the formula:
\[m = \frac{y_2 - y_1}{x_2 - x_1}\]
Identify the coordinates of the two points given: \((2, -1)\) and \((-3, -3)\). Here, let \((x_1, y_1) = (2, -1)\) and \((x_2, y_2) = (-3, -3)\).
Substitute the coordinates into the slope formula:
\[m = \frac{-3 - (-1)}{-3 - 2}\]
Simplify the numerator and denominator separately:
Numerator: \(-3 - (-1) = -3 + 1\)
Denominator: \(-3 - 2\)
Write the simplified fraction for the slope:
\[m = \frac{-3 + 1}{-3 - 2}\]
This fraction represents the slope of the line passing through the two points.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Slope of a Line
The slope of a line measures its steepness and direction, calculated as the ratio of the vertical change (rise) to the horizontal change (run) between two points. It is often represented by 'm' and found using the formula m = (y2 - y1) / (x2 - x1).
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The Slope of a Line
Coordinate Points
Coordinate points are pairs of numbers (x, y) that represent positions on the Cartesian plane. Understanding how to use these points is essential for calculating slope, as the differences in their x and y values determine the line's steepness.
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Graphs and Coordinates - Example
Slope Formula Application
Applying the slope formula involves substituting the coordinates of two given points into m = (y2 - y1) / (x2 - x1). Careful substitution and simplification yield the slope, which describes the line passing through those points.
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