The common difference, d, is 5 and the starting value, a, is 2.
Filling this in the form of
<span>you get
</span>
In a recent 10 year period, the change in the number of visitors to U. S. National Park was about -11,150,000.
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The common difference, d, is 5 and the starting value, a, is 2.
Filling this in the form of
<span>you get
</span>
