The MEDIAN.
When ordering the set, make sure the numbers go from lowest to jighest , or highest to lowest ( Rank order).
NB
MEAN is the sum of all the terms divided by the number of terms.
MODE is the most frequent term.
RANGE is the different between highest and lowest terms.
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The middle value in an ordered set is the median.
Example:
In the set - 1, 3, 4, 11, 15, 17, 19
11 would be the median.
The middle value in a data set is the median. If there are an even number of values in the set, you average the middle two values to get the median.
You can set variable "x" to any value, and then calculate the corresponding value for "y" - that will give you an ordered pair.
A function is a relation in which every input value has one output value. so when you have a set of ordered pairs, there can only be one x value corresponding to a y value, so when there is a set like this....{(2,3) (2,4)} the x value has two outputs making this not a function.
Coordinates
Relationship can also be represented by a set of ordered pairs called a function.