ACT Preparation / Unit 15 ACT 1417 short lesson, about 20 seconds
Line of Best Fit
Captions available
The idea
A line of best fit runs through the middle of a scatter plot's points and models the trend. Its slope is the predicted change in y per unit of x.
In practice
The invented line "predicted score = 2.5h + 60" predicts 2.5 more points per extra hour of study.
Where people slip
The line predicts typical values, not exact ones.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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