Warmups - Quiz Pencil and Calculators Only Write your answers on the answer lines

Try with a Mathlete 1 Graph: x + 2y = 6 xy

5-5 Functions Objective: To identify a function and to find the value of a function for a given element of the domain. Standard 16.0

Function Function: for every x, there is only 1 y. or your “x” cannot repeat

Is this a function? Ordered pairs (2,3)(3,0)(5,2)(-1,-2)(4,1) Reason: no repeating x values (3,4)(5,1)(3,-1)(0,6) Reason: repeating x values Yes No

Is this a function? Table xy xy No X repeats Yes

Is this a function? Map No 2 arrows Yes

Is this a function? Graph Vertical line test – drag your pencil across the graph, if it ever touches the graph in more than one spot, it is not a function. No Fails vertical line test Yes

Not a function if: x + y = 3 y = x 2 – 4 2y + 4 = 0 |y| + 3 = 6 x = 4y 2 + x = 6 Yes No

Not a function if: No - y 2 No - “only x” No - |y|

Homework 5-4 Study Guide

Cool Down Is it a linear equation? No: Denominator Exponent Multiply y = 2 x 4 2. x - 2y = y + 2 = x - 7y = 2x x 2 – 3x = y6. 5xy = 30