Which of the following sets would have a graph with an open circle on 5 and a ray pointing left on the number line? . 1) {x | x r, x ≤ 5}. 2) {x | x r, x > 5}. 3) {x | x r, x < 5}

The correct answer is choice 3, {x|x∈R, x<5}.

Explanation:
Since the circle on 5 is open, this means it must be strictly less than or strictly greater than; 5 is not itself included in the solution so there can be no "or equal to" part of the symbol. Since the ray points to the left, that is the numbers less than 5, so we must have x<5.

i think that it is 3 but i promise i am not sure