In a line graph what is the y-axis?

Answer 1

On graph paper.

The horizontal line is the x-axis.

The vertical line is the y-axis.

Where the two line intersect is deemed to be the origin, and given the co-ordinates , in (x,y) form , of (0,0).

Answer 2

The main vertical line going up the middle is generally refered to as the y axis, while the horizontal line that meets the yaxis in the middle is refered to as the x axis.

the line that's going up the line that's going across is the x axis