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To graph the system \( y < 4x + 1 \) and \( y > -x + 2 \), follow these steps:
1. **Draw the boundary lines**:
- \( y = 4x + 1 \) (dashed line)
- \( y = -x + 2 \) (dashed line)
2. **Find the intersection point**:
- Solve \( 4x + 1 = -x + 2 \) to get \( x = \frac{1}{5} \) and \( y = \frac{9}{5} \).
3. **Determine the shading**:
- For \( y < 4x + 1 \), shade below the line.
- For \( y > -x + 2 \), shade above the line.
4. **Identify the solution region**:
- The overlapping shaded area represents all points that satisfy both inequalities.
This graph shows all points (x, y) that meet both \( y < 4x + 1 \) and \( y > -x + 2 \).
Solución
We wish to graph the system
y < 4x + 1
y > –x + 2
follow these steps:
1. Find the boundary lines:
• Line 1: y = 4x + 1
• Line 2: y = –x + 2
Note: Since the inequalities are strict (< and >), these lines themselves are not part of the solution region. When you draw them, use dashed lines.
2. Find the intersection point of the two lines:
Set 4x + 1 = –x + 2
4x + x = 2 – 1
5x = 1
x = 1/5
Then substitute back to find y:
y = 4(1/5) + 1 = 4/5 + 1 = 9/5
The lines intersect at (1/5, 9/5).
3. Decide which side of each line to shade.
• For y < 4x + 1:
Pick a test point not on the line (0,0) is convenient.
Test: 0 < 4(0) + 1 ⟹ 0 < 1, which is true.
Thus, the region containing (0,0) is the solution for y < 4x + 1.
• For y > –x + 2:
Again, test (0,0).
Test: 0 > –(0) + 2 ⟹ 0 > 2, which is false.
So pick another test point; try (0,3).
Test: 3 > –(0) + 2 ⟹ 3 > 2, which is true.
Thus, the region containing (0,3) is the solution for y > –x + 2.
4. Shade the common (overlapping) region:
• Shade below the dashed line y = 4x + 1
• Shade above the dashed line y = –x + 2
The solution to the system is the area where these two shaded regions overlap.
5. Sketching:
• Draw the two dashed boundary lines.
• Mark their intersection at (1/5, 9/5).
• Shade the region that lies below y = 4x + 1 and above y = –x + 2. This overlapping area is your final answer.
This graph represents all points (x, y) that satisfy y < 4x + 1 and y > –x + 2.
Respondido por UpStudy AI y revisado por un tutor profesional
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Explicar
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