Which one of the scatter plots below corresponds to the least-squares regression line: y = -2761 +50.3x 4000 3000 A - 1000 3000 2000 0 1000 60 F8 80 80 100 X 100 X 120 120 140 140 B 1000 0 -1000 -2000 -3000 8000 7000 6000 5000 4000 -60 -140 -120 -100 X 0 -80 20 -60

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**Educational Context: Understanding Least-Squares Regression Lines**

The following scatter plots are used to analyze which one corresponds to the given least-squares regression line:

\[ \hat{y} = -2761 + 50.3x \]

**Scatter Plots Analysis:**

- **Plot A:**
  - **Axes:** 
    - X-axis ranges from 60 to 140
    - Y-axis ranges from 0 to 5000
  - **Description:**
    - Shows a strong positive correlation. Data points are dispersed upward from left to right.

- **Plot B:**
  - **Axes:**
    - X-axis ranges from -60 to 20
    - Y-axis ranges from -3000 to 1000
  - **Description:**
    - Displays a moderate positive correlation. The data points trend upwards but exhibit more spread compared to Plot A.

- **Plot C:**
  - **Axes:**
    - X-axis ranges from 60 to 140
    - Y-axis ranges from -1000 to 3000
  - **Description:**
    - Shows a strong negative correlation. Points trend downward from left to right.

- **Plot D:**
  - **Axes:**
    - X-axis ranges from -140 to -60
    - Y-axis ranges from 4000 to 8000
  - **Description:**
    - Exhibits a strong negative correlation. Data points slope downward with a consistent pattern.

**Conclusion:**
To determine which plot matches the regression line \(\hat{y} = -2761 + 50.3x\), consider the positive slope (50.3), indicating that as \(x\) increases, \(y\) should increase. Plot A or B would be logical choices due to the positive correlation observed.
Transcribed Image Text:**Educational Context: Understanding Least-Squares Regression Lines** The following scatter plots are used to analyze which one corresponds to the given least-squares regression line: \[ \hat{y} = -2761 + 50.3x \] **Scatter Plots Analysis:** - **Plot A:** - **Axes:** - X-axis ranges from 60 to 140 - Y-axis ranges from 0 to 5000 - **Description:** - Shows a strong positive correlation. Data points are dispersed upward from left to right. - **Plot B:** - **Axes:** - X-axis ranges from -60 to 20 - Y-axis ranges from -3000 to 1000 - **Description:** - Displays a moderate positive correlation. The data points trend upwards but exhibit more spread compared to Plot A. - **Plot C:** - **Axes:** - X-axis ranges from 60 to 140 - Y-axis ranges from -1000 to 3000 - **Description:** - Shows a strong negative correlation. Points trend downward from left to right. - **Plot D:** - **Axes:** - X-axis ranges from -140 to -60 - Y-axis ranges from 4000 to 8000 - **Description:** - Exhibits a strong negative correlation. Data points slope downward with a consistent pattern. **Conclusion:** To determine which plot matches the regression line \(\hat{y} = -2761 + 50.3x\), consider the positive slope (50.3), indicating that as \(x\) increases, \(y\) should increase. Plot A or B would be logical choices due to the positive correlation observed.
Expert Solution
Step 1

Regression equation

Y = -2761 + 50.3x

For getting scatter plot, 

  • Put values of x in equation, and get corresponding y value. 
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