Question

cell phones many cell phone plans have an option to include more than one phone. the function for the monthly cost of cell phone service from a wireless company is $f(x)=25x + 200$, where x is the number of phones on the plan. find and interpret $f(3)$ and $f(5)$.
(3)=$\square$, which is the cost of a cell phone plan with $\square$ phones for 1 month.
(5)=$\square$, which is the cost of a cell phone plan with $\square$ phones for 1 month.

Explanation:

Step1: Substitute \(x = 3\) into \(f(x)=25x + 200\)

Substitute \(x = 3\) into the function \(f(x)=25x+200\).

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Step2: Substitute \(x = 5\) into \(f(x)=25x + 200\)

Substitute \(x = 5\) into the function \(f(x)=25x+200\).

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Answer:

\(f(3)=275\), which is the cost of a cell phone plan with \(3\) phones for \(1\) month. \(f(5)=325\), which is the cost of a cell phone plan with \(5\) phones for \(1\) month.