📊 Scatter Plot Calculator
Analyze data points and correlation
Data Points (x, y)
How to Use This Calculator
Enter Data Points
Input (x, y) coordinates of your data points. Add more points as needed (minimum 2 points).
Calculate
Press "Analyze Scatter Plot" to calculate correlation, regression line, and R² value.
View Results
See the regression line equation, correlation coefficient, R² value, and statistical measures.
Formula
Correlation: r = (nΣxy - ΣxΣy) / √[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]
Slope: m = (nΣxy - ΣxΣy) / (nΣx² - (Σx)²)
Intercept: b = ȳ - mẍ
About Scatter Plot Calculator
The Scatter Plot Calculator analyzes data points to calculate correlation coefficient, regression line, and R² value. It helps understand relationships between variables.
When to Use This Calculator
- Statistics: Analyze relationships between variables
- Data Analysis: Find trends and correlations in data
- Science: Model relationships in experiments
- Economics: Predict trends and relationships
Frequently Asked Questions
What is a scatter plot?
A scatter plot is a graph showing data points (x, y) to visualize relationships between two variables. It helps identify correlations and trends.
What is the correlation coefficient?
Correlation coefficient (r) measures linear relationship strength. It ranges from -1 to 1: 1 = perfect positive correlation, -1 = perfect negative correlation, 0 = no correlation.
What does R² mean?
R² (coefficient of determination) measures how well the regression line fits the data. It ranges from 0 to 1, where 1 means perfect fit.