Question

Choose the true statement about the graph of x - 1 ≤ 2.

open circle on 1 and all numbers to the right shaded
closed circle on 1 and all numbers to the left shaded
closed circle on 3 and all numbers to the left shaded
open circle on 3 and all numbers to the left shaded

Answer 1

When you have "<" or ">", you'll use opened circle; when you have "≤" or "≥", you'll use closed circle. Once you understand this, you can rule out 2 options.
Next, solve the given inequality inequality, i.e. make x as the subject. Then you can find your answer.