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 (the y-intercept), we'll calculate the linear regression equation 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 (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:
- What is the slope () of the line of best fit for this data?
- How would changing one data point affect the line of best fit?
- What does the value of represent in this context?
- How can we calculate the correlation coefficient to determine the strength of the linear fit?
- 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!
Ask a new question for Free
By Image
Drop file here or Click Here to upload
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