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
It is called the ordinate.
The sex chromosomes of a man are XY (vs. XX for a woman).
.... then your graph is inverted.
xy - xy = 0
xy + xy = 2xy
XY
It is an expression in the form of: xy+7
We use y_y axes
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.
During a typical power plant startup, all components of the power plant are started slowly. The turbine is first rolled at a slow rpm. Then the rpm is increased gradually to a point where it can match the frequency of the grid. At this point, the turbine can be synchronized with the grid and start outputting electricity into the grid.