Define each concept.(a) Function(b) Domain and range of a function(c) Graph of a function(d) Independent and dependent variables

1. Determine if the set or relation forms a function. (a){(-2, 1), (2, 2), (-1, 2), (1, 2), (0, 2), (4, 2)} (b){(1, 2), (–3, 10), (0, 0), (4, 12), (–2, 0)}. (c){(-1, 1), (–2, 4), (10, 8), (-1, 0), (4, 20), (3, 5)}

Find the domain and range of the relation. Also determine whether the relation is a function. {(-7,- 2), (4,9), (-9, - 9), (9,9)} The domain is { }. (Use a comma to separate answers as needed.)

2. Is every relation a function? Explain why or why not?