Whenever you sign a lease for an apartment, you typically have to pay a security deposit before you even move in; this is in case something happens while you care occupying the apartment and repairs have to be made. one apartment building has apartments that rent for $750 a month and a security deposit of $300. write an equation to represent the situation described. f(x) = 300x + 750 f(x) = 300x - 750 f(x) = 750x - 300 f(x) = 750x + 300