You are buying a new internet service. the service costs $75 per month. in the equation below, d is the total number of dollars that you pay for your service, and t is the time (in months) that you keep the service. the relationship between these two variables can be expressed by the following equation: d = 75t identify the dependent and independent variables. the total number of dollars you pay (dependent / independent variable) the time in months you keep your service (dependent / independent variable)