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Scatter Plot Maker
Enter paired x and y values to draw a scatter plot. The maker plots each point, adds axis labels and a title of your choice, and can overlay the least-squares regression line. The equation of that line and the correlation coefficient r are shown underneath, and the chart can be downloaded as a PNG.
A scatter plot is the right first step before any correlation or regression: it reveals whether the relationship is linear, whether there are outliers pulling the line, and whether the spread of y changes with x. Patterns that r alone cannot show, such as a curve or two separate clusters, are obvious in the picture.
Once you have looked at the plot, the Pearson correlation calculator tests whether r is significant and the linear regression calculator gives the full fitted-line analysis with residuals, standard errors and predictions. The chart uses automatic axis ranges with rounded tick marks, and the points are plotted in the order you entered them.
Separate values with commas, spaces or new lines.
Separate values with commas, spaces or new lines.
Result and step-by-step solution
| Points (n) | 10 |
|---|---|
| Least-squares line | ŷ = 48 + 3.6x |
| Correlation r | 0.9915 (r² = 0.9831) |
Frequently asked questions
- How do I add a line of best fit?
- Leave the trend line option on. The dashed red line is the least-squares regression line ŷ = b₀ + b₁x, and its equation appears below the chart.
- What does the r value under the chart mean?
- Pearson’s correlation coefficient: how close the points are to a straight line, from −1 to +1. r² is the share of variation in y explained by x.
- Can I plot more than one series?
- This tool draws one x–y series. For grouped comparisons, use the box plot maker.
- How do I download the scatter plot?
- Click Download PNG beneath the chart to save a 1280 × 720 image.
Last reviewed: September 25, 2026. Calculations run in your browser and were validated against SciPy.