Question

Which number line represents the solution set for the inequality –negative StartFraction one-half EndFraction x is greater than or equal to 4.x ≥ 4?

A number line from negative 10 to 10 in increments of 2. A point is at negative 2 and a bold line starts at negative 2 and is pointing to the left.
A number line from negative 10 to 10 in increments of 2. A point is at negative 8 and a bold line starts at negative 8 and is pointing to the left.
A number line from negative 10 to 10 in increments of 2. A point is at negative 2 and a bold line starts at negative 2 and is pointing to the right.
A number line from negative 10 to 10 in increments of 2. A point is at negative 8 and a bold line starts at negative 8 and is pointing to the right.

Answer 1

Solve: (-1/2)x ≥ 4.

Multiply both sides by -2 (or divide by -1/2). Multiplying by a negative flips the inequality:
x ≤ -8.

So the number line with a closed dot at -8 and a bold line (ray) pointing to the left is correct — the second option.