Math Problem Statement
What is the equation of the line of best fit? Round numbers to 2 decimal places. Write your answer in y=mx+b.
Solution
pandas as pd import numpy as np from scipy.stats import linregress
Data extracted from the image
data = { "x": [2.3, 2.8, 3.1, 3.0, 3.5, 3.8], "y": [6.2, 5.7, 4.7, 3.2, 3.0, 2.8] }
Creating a DataFrame
df = pd.DataFrame(data)
Performing linear regression
slope, intercept, r_value, p_value, std_err = linregress(df['x'], df['y'])
Rounding slope and intercept to 2 decimal places
slope = round(slope, 2) intercept = round(intercept, 2)
slope, interceptThe equation of the line of best fit is:
Would you like a step-by-step explanation or have any questions?
Here are 5 related questions to expand understanding:
- How is the slope of a line calculated using data points?
- What does the slope (-2.45) signify in this context?
- What role does the intercept (11.83) play in the equation?
- How can you use the line of best fit to make predictions?
- What does the correlation coefficient () indicate in this case?
Tip: Always visualize the data alongside the line of best fit to better understand its accuracy and the relationship between variables!
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Math Problem Analysis
Mathematical Concepts
Linear Regression
Slope-Intercept Form
Formulas
y = mx + b
Slope = (Σ(xy) - ΣxΣy/n) / (Σ(x^2) - (Σx)^2/n)
Intercept = (Σy - Slope*Σx) / n
Theorems
Least Squares Method
Suitable Grade Level
Grades 9-12
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