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

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

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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

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

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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

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Is this a function? Table xy 1 50 64 23 1 xy 4 52 66 53 1 No X repeats Yes

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Is this a function? Map No 2 arrows Yes 3 4 -3 8 0 -6 10 2 3 5 0 -6 10 7

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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

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

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

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Homework 5-4 Study Guide

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Cool Down Is it a linear equation? No: Denominator Exponent Multiply 1.3 + y = 2 x 4 2. x - 2y = 5 5 3. 3y + 2 = 0 4. 8x - 7y = 2x - 5 5. 4x 2 – 3x = y6. 5xy = 30

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