Question

Which of the following sets would have a graph with an open circle on 2 and a ray pointing left on the number line

Answer 1

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{... -3, -2, -1, 0} Use set builder notation to represent the following set???
A. {x|x∈ I,x≤ 0}
b.{x|x∈ N,x≤ 0}
c.{x|x∈ R,x≤ 0}