A set containing exactly two elements in a fixed order, so that, when the elements are different, exchanging them gives a different set. Notation: (a, b) or \langle a, b\rangle
written (x,y), the x represents a value on the horizontal axis and the y represents a value on the vertical axis, while (x,y) represents a point on the graph
This is a way of using parentheses to show values for xand y The first number is the value of x, and the second number is the value of y If x = 2, and y = 3, then we can write the two values as an ordered pair: (2,3)