Question

Graph the compound inequality
x ≤ 600 or x > 800

Answer 1

Solution:
- Graph description: Shade all x less than or equal to 600 and all x greater than 800.
- Put a closed (solid) dot at 600 and shade to the left (toward −∞).
- Put an open circle at 800 and shade to the right (toward ∞).

- Interval notation: (-∞, 600] ∪ (800, ∞)

- Set-builder: { x | x ≤ 600 or x > 800 }