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Figure This!

Counting by 1s is an example of an arithmetic sequence.

A sequence like: 2, 5, 8, 11..., in which you add 3 each time, is also an arithmetic sequence.

The graph of an arithmetic sequence lies along a straight line.

A sequence like: 2, 6, 18, 54..., in which you multiply by 3 each time, is a geometric sequence.

Radioactivity is often described by a half-life, the time required for half the radioactive material to decay.

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