Question

which number line represents the x - axis when it is extended?

Explanation:

Step1: Recall x - axis properties

The x - axis in a coordinate - plane is a number line with 0 at the center, negative numbers to the left of 0 and positive numbers to the right of 0.

Step2: Analyze each option

The first option has positive numbers on both sides of 0 which is incorrect. The second option has the numbers in reverse order on the left - hand side. The third option has an incorrect number placement near the cursor. The fourth option has 0 in the middle, negative numbers to the left and positive numbers to the right which is correct for an x - axis.

Answer:

The fourth number line (the one with 0 in the middle, negative numbers like - 5, - 4, - 3, - 2, - 1 to the left of 0 and positive numbers 1, 2, 3, 4, 5 to the right of 0) represents the x - axis when extended.