Lab Graph Maker (Grades 5–12)
Type your lab data. Roji sets up the graph paper, an even scale and a best-fit line. You write the title and labels, and the checklist shows what your graph still needs.
This is example data, not yours. Change anything, or start your own graph.
What you tested
Kind of graph
Your data
Numbers only in the table. Units go in the unit boxes. You can paste rows from a spreadsheet.
Graph options
Try an example
Which graph should I use?
- Scatter plot: both variables are numbers you measured, and you want to see the pattern. Most lab graphs are this kind.
- Line graph: you measured the same thing again and again over time, like temperature every 2 minutes.
- Bar graph: you compared groups that are words, like kinds of balls or brands of paper towel.
The variable you changed on purpose (the independent variable) goes on the x-axis. The variable you measured (the dependent variable) goes on the y-axis.
What is a best-fit line?
It is one straight line drawn as close to all the points as possible. It shows the trend. It does not have to touch any point, and it never zigzags from dot to dot.
Roji finds it with the least-squares method, the same one a graphing calculator uses. If your points curve, a straight line is not a good fit. Say so in your conclusion.
R² tells how close the points are to the line. 1 means every point is on it.