Ms. padilla's monthly cell phone cost is modeled by this graph, where x is the number of minutes she uses the phone during the month. what is the slope of this line and what does it represent? question 9 options: the slope is 1/25 (or 0.04) and it represents the cost per minute for her cell phone usage. the slope is 16 and it represents the cost for her cell phone at zero minutes of usage. the slope is 1/25 (or 0.04) and it represents the initial cost for her cell phone. the slope is 16 and it represents the cost per minute for her cell phone usage.