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If the number line has open circles at (2) and (9) with shading between them, which statement is correct?

Answer and explanation

Correct answer: Both (2) and (9) are not included

An open circle means that the endpoint itself is not part of the solution. Shading between two endpoints means that all numbers strictly between them satisfy the condition. Therefore the represented interval is \((2,9)\), not including either 2 or 9. Hence option C is correct. If the circles were filled or closed, the corresponding endpoints would be included.

To read the number line, first inspect the circles and then inspect the shaded region. Both circles are open, so neither boundary belongs to the set. The shading lies only between the two points, so values such as 3, 5, and 8 are included, while 2 and 9 are excluded. This is exactly the meaning of “both endpoints are not included.”

Related tags

Linear-InequalitiesOpen-EndpointsNumber-Line

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