State the practical meaning of the slope and y-intercept for the situation described.The cost, in dollars, of retaining the services of a computer repairman in Anchorville is given by C = 48x + 18, where x is the number of hours worked.a.48 signifies the hourly rate, and 18 signifies the overhead charge.c.18 signifies the hourly rate, and 48 signifies the overhead charge.b.-48 signifies the hourly rate, and 18 signifies the travel cost.d.66 signifies the cost for an on-site inspection.