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up and down it is the y axis on a graph
A vertical line is a line with an angle of 0 or 180, it travels immediately up and down, or on a map it goes north and south.
七 [qī] It is a line going up to down, then a line going across to your right, then a little line up. Now start on your right side and draw a diagonal line in the middle of the line going down.
up and down
Up and down!!!!!