Question

1. a mobile phone company charges a monthly fee of $30 plus $0.10 per minute for international calls. let $f(x)$ represent the total monthly cost in dollars for $x$ minutes of international calls. which linear function represents this situation? a. $f(x) = 0.10x + 30$ b. $f(x) = 30x + 0.10$ c. $f(x) = 30 - 0.10x$ d. $f(x) = 0.10x - 30$

Explanation:

Step1: Analyze the components of the cost

The monthly fee is a fixed cost of $30. The cost for international calls is $0.10 per minute. For \(x\) minutes, the cost for calls is \(0.10x\).

Step2: Form the linear function

The total monthly cost \(f(x)\) is the sum of the fixed cost and the cost for calls. So, \(f(x)=0.10x + 30\).

Answer:

A. \(f(x)=0.10x + 30\)