Mistake Master
Mistake Master · AP Precalculus · Unit 3 · Step-Through Animation
One Cycle Tells You All of Them
You'll learnto measure the three numbers that describe a repeating quantity.
Some quantities never settle and never run away: they repeat. Three measurements describe the repeat completely, and each has a precise home on the graph. Watch the period get measured the wrong way first, then the right way, and watch one measured cycle predict a value a full day later.
one cycle tells you all of them
Before you start
What you're looking at
A tide graph with a time strip beneath it and two matching peaks marked.
The question
What exact feature repeats, and how long is it from one occurrence to the next?
Watch for
Peak-to-peak (a full period) versus peak-to-trough (only half) — measured the wrong way first, then the right way.
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