Alfonso graphs the inequality x greater-than negative 8 using the steps below. Step 1: Draw a number line, and place an open cir

Question

3 years ago

9

Alfonso graphs the inequality x greater-than negative 8 using the steps below. Step 1: Draw a number line, and place an open cir

cle at –8. A number line going from negative 13 to negative 3. An open circle is at negative 8. Step 2: Shade to the left of –8 to represent the infinite solutions to x greater-than negative 8. A number line going from negative 13 to negative 3. An open circle is at negative 8. Everything to the left of the circle is shaded. Step 3: Check work by substitution. x = negative 9 Negative 9 greater-than negative 8 False Which best describes the situation? The graph is incorrect. He should have used a closed circle at –8. The graph is incorrect. He should have shaded to the right of –8. The graph is correct. He should have checked his work with a number that was not on the shaded portion of the graph. The graph is correct. He should have checked his work using –8.

Mathematics