Media Services charges $40 for a phone and $30 per month for its economy plan. A linear model can be used to determine the total cost C(t) of operating the phone for t months, where C(t) = $40 + $30t. Using this model, the total cost for 3 months of service is $40 + $30 * 3 = $40 + $90 = $130.

2. Question: Media Services charges $40 for a phone and $30/month for its economy plan. Find a model that determines the total cost, C(t), of operating a Media Services phone for t months. C(t)= ____ Use the model to find the total cost for 3 months of service. Total cost= $____

7. Linear Functions are used by many companies to calculate how they may pair up to another company or how their services work such as the example of the cell phone company. Not only is this used for business but also in art, using a linear perspective can add visually appealing looks to the piece of artwork.