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Use the y-intercept and slope to sketch the graph of each equation. $$6-y=0$$

Short Answer

Expert verified
The graph is a horizontal line crossing the y-axis at 6.

Step by step solution

01

Write the Equation in Slope-Intercept Form

First, rearrange the given equation to the form \( y = mx + b \), where \( m \) is the slope and \( b \) is the y-intercept. The given equation is \( 6 - y = 0 \). Solve for \( y \) by adding \( y \) to both sides and subtracting 6 from both sides to get \( y = 6 \).
02

Identify the Slope and Y-intercept

In the equation \( y = 6 \), the slope \( m \) is 0 as there is no \( x \) term. The y-intercept \( b \) is 6. This means the line is horizontal and crosses the y-axis at 6.
03

Sketch the Graph

To sketch the graph, plot a horizontal line that passes through the point (0, 6) on the y-axis. Since the slope is 0, the line will remain horizontal with no inclination.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Understanding the Y-Intercept
The y-intercept is where the line crosses the y-axis. In an equation of the form \(y = mx + b\), \(b\) is the y-intercept. This value indicates the point at which the line touches the y-axis, meaning it is where \(x = 0\). For the equation in the exercise, \(y = 6\), the y-intercept is 6. This tells us that the line passes through the point (0, 6) on the coordinate plane. It's important to understand how to identify the y-intercept as it helps you quickly place at least one point on your graph.
Defining the Slope
The slope, represented by \(m\) in the equation \(y = mx + b\), defines the steepness of the line. It tells us how much the y-value changes for a one-unit change in the x-value. A positive slope means the line rises as it moves from left to right, while a negative slope means it falls. In the equation \(y = 6\), there's no \(x\) term, implying that the slope \(m\) is 0. This zero slope indicates a horizontal line, emphasizing no change in y as x varies.
Exploring the Slope-Intercept Form
The slope-intercept form of a linear equation is \(y = mx + b\). Here, \(m\) is the slope, and \(b\) is the y-intercept. This format makes it easier to graph linear equations because you can directly read off the slope and y-intercept. Given \(y = mx + b\), you can:
  • Identify the y-intercept \(b\), where the line crosses the y-axis.
  • Determine the slope \(m\), which tells you how the line slants.
Using these two parameters helps in creating an accurate graph of the linear equation.
Characteristics of Horizontal Lines
A horizontal line has a slope \(m\) of 0. It runs parallel to the x-axis and does not rise or fall. Equations such as \(y = c\), where \(c\) is a constant, describe horizontal lines. For instance, in the given exercise, \(y = 6\) represents a horizontal line passing through \(y = 6\). In graphing a horizontal line:
  • Plot a point at (0, c) on the y-axis.
  • Draw a straight line through this point, parallel to the x-axis.
This method ensures clarity and accuracy in representing horizontal lines on a graph.

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