Question

multiple-choice question if a coordinate system has an x and y axis that are perpendicular, that means the x and y axis are straight up and down the x and y axis are parallel to each other the x and y axis make right angles (90 degrees)

Explanation:

To solve this, we analyze each option:

• Option 1: "Straight up and down" doesn't define perpendicularity. Perpendicular is about angle, not just vertical alignment.
• Option 2: Parallel lines never meet, but perpendicular lines intersect at 90 degrees, so they can't be parallel.
• Option 3: By definition, two lines (or axes) that are perpendicular intersect at a right angle (90 degrees). So this matches the definition of perpendicular.

Answer:

the x and y axis make right angles (90 degrees)