Coordinates
Coordinates are usually a pair of numbers which describe the position of a point on a grid.
The first number of is the postion of the the point relative to the horizontal (x) axis and the second number is the position of the the point relative to the vertical (y) axis.
For example the coordinates of the point a on the grid below are (2,4).
Can you identify the co-ordinates of all five points on this grid?

a | ( | 2 | , | 4 | ) | ✔ | ✔ |
b | ( | , | ) | ||||
c | ( | , | ) | ||||
d | ( | , | ) | ||||
e | ( | , | ) |