Step 1 :The Fax Corporation bought a fax machine for $700. The fax machine depreciates at a rate of $25 a month.
Step 2 :Find a function F that can be used to determine the value of the fax machine t months after purchase.
Step 3 :The value of the fax machine decreases by $25 each month. So, after t months, the value of the fax machine would have decreased by $25t.
Step 4 :The initial value of the fax machine is $700. Therefore, the value of the fax machine after t months would be $700 - 25t.
Step 5 :The function F(t) that can be used to determine the value of the fax machine t months after purchase is \(F(t)= 700 - 25t\)
Step 6 :\(\boxed{F(t)= 700 - 25t}\)