On the set of axes below, graph the ystem of inequalities: 2x+y 2 8 y-5< 3x

Intermediate Algebra
19th Edition
ISBN:9780998625720
Author:Lynn Marecek
Publisher:Lynn Marecek
Chapter3: Graphs And Functions
Section3.4: Graph Linear Inequalities In Two Variables
Problem 277E: Harrison works two part time jobs. One at a gas station that pays $11 an hour and the other is IT...
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**Graphing a System of Inequalities**

On the set of axes below, we will graph the following system of inequalities:

\[ 
2x + y \ge 8 
\]
\[ 
y - 5 < 3x 
\]

To graph these inequalities, follow these steps:

### Step-by-Step Instructions:

1. **Graphing the Boundary Line for \(2x + y \ge 8\):**
   - Rewrite the inequality in slope-intercept form: \( y \ge -2x + 8 \).
   - Plot the boundary line \( y = -2x + 8 \). This line has a slope of -2 and a y-intercept of 8.
   - Since the inequality is \( \ge \), shade the region above the line.

2. **Graphing the Boundary Line for \(y - 5 < 3x\):**
   - Rewrite the inequality in slope-intercept form: \( y < 3x + 5 \).
   - Plot the boundary line \( y = 3x + 5 \). This line has a slope of 3 and a y-intercept of 5.
   - Since the inequality is \( < \), shade the region below the line with a dashed line to indicate that points on the line are not included in the solution set.

3. **Determine the Solution Region:**
   - The solution region will be the area where the shaded regions of both inequalities overlap.

### Determine if the Point (1, 8) is in the Solution Set:

Now, let's determine if the point \( (1, 8) \) is in the solution set:

1. Substitute \( x = 1 \) and \( y = 8 \) into \( 2x + y \ge 8 \):
   \[
   2(1) + 8 \ge 8 \implies 2 + 8 \ge 8 \implies 10 \ge 8 
   \]
   This inequality is true.

2. Substitute \( x = 1 \) and \( y = 8 \) into \( y - 5 < 3x \):
   \[
   8 - 5 < 3(1) \implies 3 < 3 
   \]
   This inequality is false since 3 is not less than 3.

Therefore, the point \( (1, 8
Transcribed Image Text:**Graphing a System of Inequalities** On the set of axes below, we will graph the following system of inequalities: \[ 2x + y \ge 8 \] \[ y - 5 < 3x \] To graph these inequalities, follow these steps: ### Step-by-Step Instructions: 1. **Graphing the Boundary Line for \(2x + y \ge 8\):** - Rewrite the inequality in slope-intercept form: \( y \ge -2x + 8 \). - Plot the boundary line \( y = -2x + 8 \). This line has a slope of -2 and a y-intercept of 8. - Since the inequality is \( \ge \), shade the region above the line. 2. **Graphing the Boundary Line for \(y - 5 < 3x\):** - Rewrite the inequality in slope-intercept form: \( y < 3x + 5 \). - Plot the boundary line \( y = 3x + 5 \). This line has a slope of 3 and a y-intercept of 5. - Since the inequality is \( < \), shade the region below the line with a dashed line to indicate that points on the line are not included in the solution set. 3. **Determine the Solution Region:** - The solution region will be the area where the shaded regions of both inequalities overlap. ### Determine if the Point (1, 8) is in the Solution Set: Now, let's determine if the point \( (1, 8) \) is in the solution set: 1. Substitute \( x = 1 \) and \( y = 8 \) into \( 2x + y \ge 8 \): \[ 2(1) + 8 \ge 8 \implies 2 + 8 \ge 8 \implies 10 \ge 8 \] This inequality is true. 2. Substitute \( x = 1 \) and \( y = 8 \) into \( y - 5 < 3x \): \[ 8 - 5 < 3(1) \implies 3 < 3 \] This inequality is false since 3 is not less than 3. Therefore, the point \( (1, 8
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