In Exercises 17–24, a) List all possible rational roots. b) List all possible rational roots. c) Use the quotient from part (b) to find the remaining roots and solve the equation. x4−2x3−5x2+8x+4=0
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- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
2. Graphs of Equations
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Problem 31
Textbook Question
Match each equation with the sketch that most closely resembles its graph. y = 5

Verified step by step guidance1
Recognize that the equation \(y = 5\) represents a horizontal line because it is in the form \(y = c\), where \(c\) is a constant.
Understand that for every value of \(x\), the value of \(y\) remains constant at 5, so the graph is a straight line parallel to the x-axis.
Identify that the line will cross the y-axis at the point \((0, 5)\), which is the y-intercept.
Note that the slope of the line is 0, meaning there is no rise or fall as you move along the x-axis.
Match the equation \(y = 5\) with the sketch that shows a horizontal line passing through the y-coordinate 5.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Horizontal Lines
A horizontal line is a straight line where all points have the same y-coordinate. Its equation is of the form y = k, where k is a constant. For y = 5, the line passes through all points with y-coordinate 5, parallel to the x-axis.
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Graphing Linear Equations
Graphing linear equations involves plotting points that satisfy the equation and connecting them. For equations like y = 5, the graph is a straight line. Understanding how to interpret and sketch these lines is essential for matching equations to their graphs.
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Coordinate Plane and Axes
The coordinate plane consists of the x-axis (horizontal) and y-axis (vertical). Knowing how to locate points and lines relative to these axes helps in visualizing graphs. For y = 5, the line is parallel to the x-axis and crosses the y-axis at 5.
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