# Algebra

The technology cewnter bought a fax machine for \$625.00 and it depreciates at a rate of \$25.00 a month. Find a function(f) that can be used to determine the value of the fax amchine (t) months after purchase.

Would it be F(t)=25(t)-625

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1. When you devise a function, always check with know values to make sure at least the given conditions are satisfied.

At t=0, the function should give \$625, ie. f(0)=625.
After two months, it should give \$625-2*25=\$575, or f(2)=575.

Your attempt is close, but contains an error that makes the function not satisfy the given conditions.

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