In the past 15 years especially, the AP Physics exams have asked students to make and interpret best-fit trend lines on data-based or lab-based questions. These constant slopes can be used to find relationships between variables and determine natural constants. This skill is tested on all AP Physics exams (including the discontinued B exam). In this article, I explain precisely how students can create best-fit lines that earn points and provide several example labs that include this specific skill.

3.
Michael
White
,
Isaac Newton: The Last Sorcerer
(
Helix Books
,
1997
), p.
58
.
Google Scholar
 
8.
For a good general discussion, see
Christopher
Deacon
, “
The importance of graphs in undergraduate physics
,”
Phys. Teach.
37
,
270
(
May
1999
).
https://doi.org/10.1119/1.880285
Google Scholar
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2022
Author(s)
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