section 1.1: relations & functions - tipp city...section 1.1: relations & functions geometry...
TRANSCRIPT
Section 1.1: Relations & Functions
Geometry
January 11, 2016
Chapter 1: Linear Relations & Functions11: Relations & Functions
Relation:set of ordered pairscan also be described by a rule or equation relating x to y
Domain:all possible xvalues of a relation
Range: all possible yvalues of a relation
Example 1: Given that x is an integer, state the relation representing the equation by making a table of values. Then graph the ordered pairs of the relation.
y = 2x and 0<x≤4
Section 1.1: Relations & Functions
Geometry
January 11, 2016
Example 2: The domain of a relation is all positive integers less than 8. The range y of the relation is x less 4, where x is a member of the domain. Write the relations as a table of values and as an equation. Then graph the relation.
all real numbers means every number: whole, integer, rational (fraction), irrational, decimal, etc.
Example 3: State the Domain and Range of each graph.
Section 1.1: Relations & Functions
Geometry
January 11, 2016
Function*relations in which each element of the domain is paired with
exactly one element in the range.*Every xvalue has exactly one yvalue*Every input has exactly one output
Example 4: State the domain and range. Then state if the relation is a function
a. {(‑3, 4), (0, 0), (3, 4)} b. {(1, 4), (2, 5), (1, ‑4)}
Vertical Line TestIf every vertical line drawn on the graph of a relation passes
through no more than one point of the graph, then the relation is a function.Example 5: Are the following relations functions?
Section 1.1: Relations & Functions
Geometry
January 11, 2016
Function Notation: y = f(x) said as "f of x" in other words, the "function of x"
Example 6: Evaluate each function for the given value.
a.) f(4) if f(x) = 3x3 7x2 2x b.) g(9) if g(x) = I6x 77I
c.) h(m + 1) if h(x) = 2x2 4x + 2