Unit 5 Functions Pre-Algebra CCSS Heading Functions can be represented by: Graphs Tables Mappings Ordered Pairs Function Rules Heading Unit 5 Functions Pre-Algebra CCSS ( , ) f(x) = 2x + 1 g(x) = 4x h(x) = x2 – 1 Input Output

A special relation that has EXACTLY ONE OUTPUT for each input VOCABULARY! EXAMPLES! Relation: Function: Input (or Domain): Output (or Range): Note: When writing the domain and range: List values in ______________ and do not __________________ values. A set of ordered pairs A special relation that has EXACTLY ONE OUTPUT for each input (or exactly ONE y-value for each x-value) The value substituted into a function. The set of all x-values The value that results when an input is substituted into a function. The set of all y-values order repeat

Taken from Pre-Algebra 8 Sem1 Practice Exam B Taken from Pre-Algebra 8 Sem1 Practice Exam B Taken from old Algebra I Honors Sem1 Practice Exam (revised 2009) 19. What is the domain of the following function? {(–3, 1), (–2, 7), (4, 2), (2, 5)} A. C. B. D. Taken from Pre-Algebra 8 Sem1 Practice Exam C

Mapping Diagram: Tell whether or not the relation is a function. If not, state why. If so, state the domain and range. 1. 2. 3. 4. List the domain values (on left) in order and the range values (on right) in order. Draw arrows from the domain values to their range values. ( , )