The relation given by the first set is a function because each input (x-value) has exactly one output (y-value) associated with it.
The relations given by the second and third sets are also functions because each x-value in the sets has exactly one associated y-value.
The relation given by the fourth set is not a function because the input value 5 has multiple output values (4, 6, 8, 10, 12) associated with it.
Which of the relations given by the following sets of ordered pairs is a function?
[] {(1,2),(-4,8),(-3,5),(1,-2),(7,12)}
[] {(6,1),(-4,1),(3,5),(2,4),(-7,2)}
[] {(5,4),(4,3),(3,2),(4,5),(2,1)}
[] {(5,4),(5,6),(5,8),(5,10),(5,12)}
1 answer