Graph the linear function 2x – y = 3. %3D -3 -7 -8 3. 6.

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.CR: Chapter Review
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**Transcription for Educational Website**

### Graphing Linear Functions

**Objective:** Graph the linear function given by the equation \(2x - y = 3\).

**Equation Breakdown:**
- To find the graph of the linear function, rewrite the equation in slope-intercept form \(y = mx + b\). Start by rearranging \(2x - y = 3\).
  - Solve for \(y\): 
    \[
    y = 2x - 3
    \]

**Graph Explanation:**
- **Axes:** The graph is a grid with horizontal (x-axis) and vertical (y-axis) lines. The axes are marked at intervals from -8 to 8 on both axes.
- **Slope and Intercept:**
  - The equation \(y = 2x - 3\) shows a slope \(m = 2\) and a y-intercept \(b = -3\).
  - The slope of 2 means that for every unit increase in \(x\), \(y\) increases by 2.

**Instructions to Graph:**
1. **Plot the Y-Intercept:**
   - Locate \((0, -3)\) on the y-axis and plot this point.

2. **Use the Slope:**
   - From \((0, -3)\), use the slope to find another point. 
   - Since the slope is 2, move up 2 units and 1 unit to the right to find the next point \((1, -1)\).

3. **Draw the Line:**
   - Connect these points with a straight line, extending it across the grid.

This visual representation helps understand how changes in the equation's slope and intercept affect the graph's direction and position on the coordinate plane. Explore more to see how different values alter the graph!
Transcribed Image Text:**Transcription for Educational Website** ### Graphing Linear Functions **Objective:** Graph the linear function given by the equation \(2x - y = 3\). **Equation Breakdown:** - To find the graph of the linear function, rewrite the equation in slope-intercept form \(y = mx + b\). Start by rearranging \(2x - y = 3\). - Solve for \(y\): \[ y = 2x - 3 \] **Graph Explanation:** - **Axes:** The graph is a grid with horizontal (x-axis) and vertical (y-axis) lines. The axes are marked at intervals from -8 to 8 on both axes. - **Slope and Intercept:** - The equation \(y = 2x - 3\) shows a slope \(m = 2\) and a y-intercept \(b = -3\). - The slope of 2 means that for every unit increase in \(x\), \(y\) increases by 2. **Instructions to Graph:** 1. **Plot the Y-Intercept:** - Locate \((0, -3)\) on the y-axis and plot this point. 2. **Use the Slope:** - From \((0, -3)\), use the slope to find another point. - Since the slope is 2, move up 2 units and 1 unit to the right to find the next point \((1, -1)\). 3. **Draw the Line:** - Connect these points with a straight line, extending it across the grid. This visual representation helps understand how changes in the equation's slope and intercept affect the graph's direction and position on the coordinate plane. Explore more to see how different values alter the graph!
**Graphing the Linear Function \(4x + y = 7\)**

The task is to graph the linear equation \(4x + y = 7\).

**Equation Description:**

- We begin with the equation \(4x + y = 7\).
- We can rearrange it to the slope-intercept form \(y = -4x + 7\).

**Graph Description:**

- The graph is plotted on a standard Cartesian coordinate system with both x and y axes labeled.
- The axes range from -8 to 8 on both the x and y axes, with grid lines to facilitate plotting.
- The slope of the line is -4, meaning the line slopes downward from left to right.
- The y-intercept is at \(y = 7\), which is the point where the line crosses the y-axis.
- The x-intercept occurs when \(y = 0\). Setting \(y = 0\) in the equation gives the x-intercept at \(x = \frac{7}{4} = 1.75\).

**Plotting Steps:**
1. Plot the y-intercept (0, 7) on the graph.
2. Use the slope (-4) to find another point. From (0, 7), move down 4 units and right 1 unit to get the point (1, 3).
3. Draw a straight line through these points to represent the equation on the graph.

This visual representation helps to understand how the linear equation behaves in relation to the x and y axes.
Transcribed Image Text:**Graphing the Linear Function \(4x + y = 7\)** The task is to graph the linear equation \(4x + y = 7\). **Equation Description:** - We begin with the equation \(4x + y = 7\). - We can rearrange it to the slope-intercept form \(y = -4x + 7\). **Graph Description:** - The graph is plotted on a standard Cartesian coordinate system with both x and y axes labeled. - The axes range from -8 to 8 on both the x and y axes, with grid lines to facilitate plotting. - The slope of the line is -4, meaning the line slopes downward from left to right. - The y-intercept is at \(y = 7\), which is the point where the line crosses the y-axis. - The x-intercept occurs when \(y = 0\). Setting \(y = 0\) in the equation gives the x-intercept at \(x = \frac{7}{4} = 1.75\). **Plotting Steps:** 1. Plot the y-intercept (0, 7) on the graph. 2. Use the slope (-4) to find another point. From (0, 7), move down 4 units and right 1 unit to get the point (1, 3). 3. Draw a straight line through these points to represent the equation on the graph. This visual representation helps to understand how the linear equation behaves in relation to the x and y axes.
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