the set of all integers except 19 Group of answer choices {x | x ≠ 19} {x | x > 19} {x | x ∈ ℤ and x ≠ 19} {x | x ∈ and x ≠ 19}

they are simplified

step-by-step explanation:

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.