Fit the Line
Drag the line. Beat the best fit.
Select mode
A free line of best fit game
Fit the Line is a free game for practicing linear regression by eye. Drag a trendline over a scatter plot, then see the true least-squares line and your score. Play solo, or let a teacher run a live class scoreboard with a four-letter code. No accounts, no ads.
Join a class
Launch a class game
Connecting to the class server...
Difficulty
Fun names
On: every student gets a random animal name like Sassy Squirrel, so no real names show on the board.
Class
Join with this code
Go to and press Join a class.
Players
Round 01/10
Locked 0/0
Medium
Student lines
Least-squares line
Final standings
Fit the Line
Round 01/10
Total 0000
Hi --
Your line
Least-squares line
Gap between them