Functions Sylvester McMonkey McBean then tells the original Star-Belly Sneetches that he’s created a machine that takes stars OFF of bellies. — seussblog.wordpress.com

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Presentation transcript:

Functions Sylvester McMonkey McBean then tells the original Star-Belly Sneetches that he’s created a machine that takes stars OFF of bellies. — seussblog.wordpress.com Source page on kathmanduk2.wordpress.com | Source image on s1.hubimg.com

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Math Talk – Is the plain belly sneech always the input? Have students pair and share to answer this question – elicit that if the plain belly sneech is the input the star belly sneech is the output but it the star belly sneech is the input then the plain belly sneech is the output

Math Talk – How does this image relate to functions in math? y = x + 2 Elicit from students that the value of x goes in, 2 is added and results in the value of y

Math Talk – what can you conclude about the following function? y = 3x + 2 If x = 2 If x = 3 Elicit a conclusion that the output is dependent on the input. Have students graph the line using an online tool or paper and pencil

Graph the following. Are they all functions? y = 3x + 2 y = 3 – x y = x2 Have students graph the equations using an online tool or paper and pencil

Math Talk Are the following relations functions? {(2, 3), (–1, 4), (4, 5), (–2, 3)} {(4, 4), (–2, 3), (4, 2), (3, 4)} Discussion about 4 having two different outputs and is therefore not a function.

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Is this a Function? Discussion as to why this image does not depict a function

Summary Math Talk What is a function Summary Math Talk What is a function? (In your own words) Create an example to share