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Choose any value for x. Calculate 8x to get the corresponding value for y.
The Ordered Pairs are 1x20, 2x10, and 5x4.
You can write ordered pairs as ratios to determine if two sets of ordered pairs form a linear or non-linear relationship. In a table of x,y values, the ordered pairs are listed as the x value first, then the corresponding y value. Remove from the table and write as a ratio of x over y, (or y over x, if you like). In a linear relationship, all the ratios of x over y, (or y over x) are equivalent.
-1 is a one-dimensional entity. It can have no equivalent in ordered pairs.
Y is the second number in a set of ordered pairs.