The four representations of a function are The letter a in parentheses above a horizontal line._____ (a), The letter b in parentheses above a horizontal line._____ (b), The letter c in parentheses...

The four representations of a function are The letter a in parentheses above a horizontal line._____ (a), The letter b in parentheses above a horizontal line._____ (b), The letter c in parentheses above a horizontal line._____ (c), and The letter d in parentheses above a horizontal line._____ (d).