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The manager of an apartment building needs an electrician to repair the power generator for the building. The table below shows the fixed amount for a time service call and hourly charges for two different companies. Company Fixed amount Hourly Rate for a service call A $40 $55 B $75 $48 Which of the following equations gives the total cost, y, of repairing the power generator in terms of the total number of hours, x , from company A? A) y = 48x +75 B) y = 75x +48 C) y = 40x +55 D) y = 55x +40