Warm-Up 1) Write the Now-Next equation for each sequence of numbers. Then find the 10th term of the sequence. a) – 3, 5, 13, 21, … b) 2, – 12, 72, – 432, … 2) Write an input/output explicit rule for each table. Then predict the output when the input is -20. Input Output 2 5 4 7 -7 -4 1.5 3.5 Input Output -6 -11 -2 -3 2 5 9 19 b) a)

HW Check – 3.3

Testing for Functions

Recall: Function A function is a relation from one set (called the__________) to another set (called the ___________) that assigns to each input value exactly ________ output value.

Relations can be represented in 4 different ways Table Equation Graph Mapping Diagram

Is the relation a Function? If given a graph of a relation and asked to determine if the relation is a function: Use the VERTICAL LINE TEST If any vertical line passes through more than one point of the graph, the relation is not a function.

a. (city, zip code) b. (phone #, area code) EXAMPLE Does each relationship of the form (input, output) represent a function? If the relationship does not represent a function, find an example of one input that has two or more outputs. a. (city, zip code) b. (phone #, area code) c. (person, birth date) d. (last name, first name) e. (state, capital)

Coming up…. HW 3.4 QUIZ 3.2 Friday