Scatter Plot Maker
Plot two numeric variables against each other, colour the points by group, and add a least-squares trend line with its equation, R² and Pearson correlation.
Updated · By Bibin XavierData 90 × 12
| IDtext · 90 levels | Grouptext · 3 levels | Gendertext · 2 levels | Agenumeric | Hours_Studynumeric | Anxietynumeric | Motivationnumeric | Pre_Scorenumeric | Post_Scorenumeric | Exam_Scorenumeric | Passednumeric · coded | Satisfactionnumeric · coded |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S001 | Control | Male | 23 | 11.2 | 29 | 4.6 | 60 | 62 | 67 | 1 | 2 |
| S002 | Workshop | Female | 23 | 3.9 | 28 | 3.5 | 54 | 70 | 54 | 0 | 2 |
| S003 | Online | Female | 18 | 10.1 | 32 | 4 | 55 | 57 | 66 | 0 | 3 |
| S004 | Control | Male | 26 | 13.6 | 41 | 3.5 | 52 | 55 | 59 | 0 | 3 |
| S005 | Workshop | Female | 22 | 9.7 | 27 | 3.6 | 56 | 63 | 65 | 0 | 4 |
| S006 | Online | Female | 20 | 7.9 | 32 | 3.8 | 65 | 82 | 65 | 0 | 2 |
| S007 | Control | Female | 20 | 6.3 | 28 | 3 | 72 | 83 | 61 | 0 | 3 |
| S008 | Workshop | Male | 22 | 8 | 29 | 3.1 | 64 | 72 | 62 | 1 | 3 |
Variables and options
Results
90 rows · example dataExam_Score by Hours_Study
Trend line and correlation
| Statistic | Value |
|---|---|
| Equation | ŷ = 49.459 + 1.2577x |
| R² | .131 |
| Pearson r | .362 |
| p | < .001 |
| n | 90 |
Interpretation
There is a moderate positive relationship between Hours_Study and Exam_Score (r = .36, p < .001).
How to cite this tool
Using these results in a thesis, journal article, report or class assignment? Please cite this free tool so others can find it. It keeps the site free.
APA 7
Xavier, B. (2026). Scatter Plot Maker [Web application]. FreeStatisticalTools.com. https://freestatisticaltools.com/scatter-plot-maker/
BibTeX
@software{xavier_scatterplotmaker_2026,
author = {Xavier, Bibin},
title = {Scatter Plot Maker},
publisher = {FreeStatisticalTools.com},
year = {2026},
url = {https://freestatisticaltools.com/scatter-plot-maker/},
note = {Web application}
}Suggested sentence for your methods section: “The analysis was carried out with the free Scatter Plot Maker tool on FreeStatisticalTools.com (Xavier, 2026).”
What is a scatter plot?
A scatter plot shows each case as a point defined by two numeric variables. It reveals the direction, form and strength of a relationship and any outliers, and the trend line summarises the linear relationship.
When to use a scatter plot
Use a scatter plot to check the form, direction and strength of a relationship between two numeric variables before computing a correlation or regression.
How to use this tool
- Enter your data. Paste columns from Excel, Google Sheets or SPSS with variable names in the first row, or upload a CSV or Excel file. The example data shows the expected layout.
- Choose the variables. Select the x axis, y axis and colour by group (optional).
- Set the options. Fill in show trend line.
- Read the results. Results update automatically. Read the plain-English interpretation, then use Copy table to paste APA-style tables into Word and Copy for the results sentence.
How to report a scatter plot in APA style
Describe the pattern and report Pearson’s r (or Spearman’s ρ for monotonic, non-linear patterns).
Frequently asked questions
How do I add a trend line to a scatter plot?
Tick “Show trend line”; the tool fits a least-squares line and shows its equation and R².
What does R² mean on a scatter plot?
The proportion of variance in Y explained by the straight line, between 0 and 1.
Can I colour points by group?
Yes. Choose a grouping variable and each group gets its own colour and legend entry.
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