What are the ordered pairs?

Ordered pairs are 2 numbers that show where a specific point is on a gird

Example:

(3,2)

This ordered pair would mean 3 over on the x-axis (horizontal) and 2 over on the y-axis (vertical)

another thing to keep in mind, since x comes before y in the alphabet, x also comes before y in ordered pairs (x,y)

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".