Question

complete the sentence.
on the coordinate plane, the number line that runs up and down is the ______.
x - coordinate y - coordinate x - axis y - axis

Explanation:

To solve this, we recall the components of a coordinate plane:

• The \( x \)-coordinate and \( y \)-coordinate are the values that represent a point's position (not the number lines).
• The \( x \)-axis is the horizontal number line (runs left - right).
• The \( y \)-axis is the vertical number line (runs up - down).

So we identify the correct term based on the description "runs up and down".

Answer:

D. \( y \)-axis