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Function (Increase and Decrease (Increasing (x 1< x2 (f(x1) <…
Function
Increase and Decrease
Increasing
x 1< x2
f(x1) < f(x2)
Because slope increase leaving previous point lower
Decrease
x1<x2
f(x1) > f(x2)
Because slope gets decrease leaving previous point higher
True Definitions and wtf does it mean
Cartesian Product
A X (cross/and) B
All possible combinations of elements of A and B
A relation
Natural Domain
Want to find results, need specific domains to find other results
x belongs to A
Ordered pair is a subset
#
Ex. (1,2) is a subset of A x B
{ } Set
(a,b)
set of all ordered pairs
Element Pairings
A function is suppose to pair one element from A to another element in B
A is to be domain while B is range
Domain not specified? Set of all real numbers applicable to function
Vertical line test
One X CAN'T have 2 y's
input > function > output
Ex. f(x) = x^2 if x even
x+5 if x is odd
