It is the horizontal line that is perpendicular to the y axis at the point of origin
Which point is not located on the xaxis or the yaxis of a coordinate grid?Read more:Which_point_is_not_located_on_the_xaxis_or_the_yaxis_of_a_coordinate_grid
The sex chromosomes of a man are XY (vs. XX for a woman).
It is called the ordinate.
.... then your graph is inverted.
xy + xy = 2xy
xy - xy = 0
The distance between grid lines can vary depending on the specific grid system being used. In a typical Cartesian grid, the distance is often uniform and can be defined by the scale of the grid, such as 1 unit apart. In other contexts, such as maps or digital designs, the spacing may be determined by the requirements of the project. Therefore, it's important to refer to the specific grid's guidelines to determine the exact distance.
XY
We use y_y axes
It is an expression in the form of: xy+7
You should find the answer on the ordnance survey website: http://www.ordnancesurvey.co.uk/oswebsite/gi/nationalgrid/nghelp1.html In essence the first two digits of X and Y correspond to a grid of alphabetical references, giving you the first two letters of the BNG. Hope this helps.
The answer depends on whether xy are commutative numbers or operators in a permutation group.