Question

The vertical thick line is called __________ axis.​

Answer 1

The vertical thick line is called the y or ordinate axis.

All graphs have a x and y axis. Coordinates, written as an ordered pair of numbers, are used to give positions on a graph. The x-axis is horizontal (across), while the y-axis is vertical (up-down).

Answer 2

Explanation:

The vertical thick line is called y-axis.