Presentation is loading. Please wait.

Presentation is loading. Please wait.

Bellringer 1. 2. 3..

Similar presentations


Presentation on theme: "Bellringer 1. 2. 3.."— Presentation transcript:

1 Bellringer

2 Relations and Functions Woohoo!!!
Chapter 5 Section 2 Relations and Functions Woohoo!!!

3 Some key terms Relation- a set of ordered pairs
Domain- the set of first coordinates, the x’s Range- the set of second coordinates, the y’s

4 Functions Function- a function is a relation in which each member of the domain is paired with exactly one member of the range In other words… you can not have a domain (x value) repeat itself Vertical Line Test- If any vertical line passes through no more than one point of the graph of a relation then the relation is a function

5 How to tell if it is a function
Since each element of the domain is paired with exactly one element of the range this is a function. Also, notice no x values are repeated

6 How to tell if it is a function
This is called a mapping. It shows the relation between each x and y value It does not matter that the y values are shared as long as the x value is not repeated or shared this is a function X 2 3 5 Y 3

7 Functional notation An equation looks like this
y = 3x + 5 This same equation written in functional notation looks like this f(x) = 3x + 5 We simply replace y with f(x)

8 Finding functional value
If f(x) = 2x +3 find each value. f(4) f(x) = 2x +3 f(4) = 2x +3 f(4) = 2(4) +3 f(4) = 8 +3 = 11 f(6a) f(x) = 2x +3 f(6a) = 2x +3 f(6a) = 2(6a) +3 f(6a) = 12a +3 = 12a +3

9 Your Turn If g(x) = 3x - 7 find each value. g(2h) 6h - 7 g(-2) -13

10 Assignment Page 244 #’s 1-33 odd


Download ppt "Bellringer 1. 2. 3.."

Similar presentations


Ads by Google