*15 Points* An electrician charges a set fee for every house call and then charges an hourly rate depending on how long the job takes. The total cost of the electrician's services can be determined using the equation C = 50 t + 100 , C=50t+100, where t t is the number of hours the electrician spends at the house working. What is the slope of the equation and what is its interpretation in the context of the problem?