Math Problem Statement

Use technology to find the line of best fit for the following data.

(-17,8),(-14,7),(-11,6),(-12,4),(-10,1),(-7,3),(-3,2),(-3,0),-2,-4),(0,-2),(2,-3),(6,-5),(4,-6) When the equation of the line is in the form y=mx+b what is the value of b?

Enter your answer as a decimal, like this: 42.25

Solution

To find the line of best fit for the given data points and determine the value of bb (the y-intercept), we'll calculate the linear regression equation y=mx+by = mx + b using technology. Let me process the data and compute the regression equation. numpy as np from sklearn.linear_model import LinearRegression

Define the data points

x = np.array([-17, -14, -11, -12, -10, -7, -3, -3, -2, 0, 2, 6, 4]).reshape(-1, 1) y = np.array([8, 7, 6, 4, 1, 3, 2, 0, -4, -2, -3, -5, -6])

Perform linear regression

model = LinearRegression() model.fit(x, y)

Extract the y-intercept (b) value

b = model.intercept_ bThe value of bb (the y-intercept) for the line of best fit is approximately -2.26.

Would you like a detailed explanation or visualization of the regression process?

Here are 5 follow-up questions related to this problem:

  1. What is the slope (mm) of the line of best fit for this data?
  2. How would changing one data point affect the line of best fit?
  3. What does the value of bb represent in this context?
  4. How can we calculate the correlation coefficient to determine the strength of the linear fit?
  5. How would the line of best fit change if the dataset was larger or contained outliers?

Tip: Always check the residuals of the regression to assess how well the model fits the data!

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Math Problem Analysis

Mathematical Concepts

Linear Regression
Statistics
Algebra

Formulas

y = mx + b (linear equation)
Linear Regression Formula

Theorems

Least Squares Method

Suitable Grade Level

Grades 9-12