Question
Graph the inequality on the axes below.
minus, 5, x, plus, 2, y, is greater than, minus, 8
−5x+2y>−8
Can you pls tell me the 2 points also they have to intercept the line so were the points on the lines are i need points outside it that go through them and pls tell me witch side is getting shaded
The points are based on the ineguality and slope
minus, 5, x, plus, 2, y, is greater than, minus, 8
−5x+2y>−8
Can you pls tell me the 2 points also they have to intercept the line so were the points on the lines are i need points outside it that go through them and pls tell me witch side is getting shaded
The points are based on the ineguality and slope
Answers
Answered by
GPT-4o mini
To graph the inequality \(-5x + 2y > -8\), let's first rewrite it in the slope-intercept form \(y = mx + b\) to easily identify the line and the points.
### Step 1: Rewrite the inequality
\[
-5x + 2y > -8
\]
Adding \(5x\) to both sides:
\[
2y > 5x - 8
\]
Now, divide everything by \(2\):
\[
y > \frac{5}{2}x - 4
\]
### Step 2: Identify the line and intercepts
Now, we can find the intercepts.
1. **Y-intercept**: Set \(x = 0\) in the equation \(y = \frac{5}{2}x - 4\):
\[
y = \frac{5}{2}(0) - 4 = -4
\]
So, the y-intercept is at the point \((0, -4)\).
2. **X-intercept**: Set \(y = 0\) in the equation \(y = \frac{5}{2}x - 4\):
\[
0 = \frac{5}{2}x - 4
\]
Adding \(4\) to both sides:
\[
\frac{5}{2}x = 4
\]
Multiply both sides by \(\frac{2}{5}\):
\[
x = \frac{8}{5} = 1.6
\]
So, the x-intercept is at the point \((1.6, 0)\).
We could summarize the intercept points:
- Y-intercept: \( (0, -4) \)
- X-intercept: \( (1.6, 0) \)
### Step 3: Graph the line
Now, we will graph the line based on these intercepts. Since the inequality is \(>\), we will draw a dashed line to indicate that points on the line are **not** included in the solution.
**Graph**:
1. Plot points \((0, -4)\) and \((1.6, 0)\) on a coordinate plane.
2. Draw a dashed line through these points.
### Step 4: Determine which side to shade
To determine which side of the line to shade, choose a test point not on the line. The point \((0, 0)\) is simple for testing:
Substituting into the original inequality:
\[
-5(0) + 2(0) > -8
\]
\[
0 > -8
\]
This is true, so we shade the side of the line that includes the point \((0, 0)\).
### Summary of the points
- **X-intercept**: \((1.6, 0)\)
- **Y-intercept**: \((0, -4)\)
### Shading
The side of the line where \((0, 0)\) is located (above the line) is shaded.
### Step 1: Rewrite the inequality
\[
-5x + 2y > -8
\]
Adding \(5x\) to both sides:
\[
2y > 5x - 8
\]
Now, divide everything by \(2\):
\[
y > \frac{5}{2}x - 4
\]
### Step 2: Identify the line and intercepts
Now, we can find the intercepts.
1. **Y-intercept**: Set \(x = 0\) in the equation \(y = \frac{5}{2}x - 4\):
\[
y = \frac{5}{2}(0) - 4 = -4
\]
So, the y-intercept is at the point \((0, -4)\).
2. **X-intercept**: Set \(y = 0\) in the equation \(y = \frac{5}{2}x - 4\):
\[
0 = \frac{5}{2}x - 4
\]
Adding \(4\) to both sides:
\[
\frac{5}{2}x = 4
\]
Multiply both sides by \(\frac{2}{5}\):
\[
x = \frac{8}{5} = 1.6
\]
So, the x-intercept is at the point \((1.6, 0)\).
We could summarize the intercept points:
- Y-intercept: \( (0, -4) \)
- X-intercept: \( (1.6, 0) \)
### Step 3: Graph the line
Now, we will graph the line based on these intercepts. Since the inequality is \(>\), we will draw a dashed line to indicate that points on the line are **not** included in the solution.
**Graph**:
1. Plot points \((0, -4)\) and \((1.6, 0)\) on a coordinate plane.
2. Draw a dashed line through these points.
### Step 4: Determine which side to shade
To determine which side of the line to shade, choose a test point not on the line. The point \((0, 0)\) is simple for testing:
Substituting into the original inequality:
\[
-5(0) + 2(0) > -8
\]
\[
0 > -8
\]
This is true, so we shade the side of the line that includes the point \((0, 0)\).
### Summary of the points
- **X-intercept**: \((1.6, 0)\)
- **Y-intercept**: \((0, -4)\)
### Shading
The side of the line where \((0, 0)\) is located (above the line) is shaded.
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