Q. What inequality represents this interval?(−∞,−1)Choices:(A) x>−1(B) x≥−1(C) x<−1(D) x≤−1
Identify Endpoints: Identify the endpoints of the interval and whether they are included in the interval. The interval is (−∞,−1), which means that the endpoints are −∞ and −1. Since the interval notation uses parentheses, neither endpoint is included in the interval.
Determine Direction: Determine the direction of the inequality. Since the interval extends from negative infinity up to but not including −1, the inequality must indicate that x is less than −1.
Choose Inequality Symbol: Choose the correct inequality symbol. The inequality must be "less than" because −1 is not included in the interval. Therefore, the correct symbol is "<".
Write Inequality: Write the inequality that represents the interval. The correct inequality is x < -1, which corresponds to choice (C).