# Precalc formal writing

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• It was the third Monday of the year and Mr. Brown walks in and greets his students: Becca & Shawndra.
• Becca wouldn't stop humming & Mr. Brown had already asked her to stop a number of times. So Mr. Brown roared, scaring Becca who let out a shrill.﻿
• "Ok class, I want you to take out your homework from last night, and Becca I want you to put number 5 on the board."
• 5. the graph﻿
• "Mr. Brown, I had actually meant to ask how to do number 5, because i couldn't understand what it was asking.﻿"
• "There will be a similar question on the test Friday, so all of you might want to pay attention. Number 5, has a graph and is asking where on the graph it increases, decreases, and remains constant. Ok first I want you to look at the far left of the graph. You can see how it climbs up to -3 (x value). On your paper you would write 'increasing: (-*inf*,-2)' because we only care about the X values."
• ﻿Mr. Brown continues...
• "Then see how it goes from -2 to 2? You would write 'Decrease: (-2,2)' and then from 2 to 4 it remains constant, so you would write 'Constant: (2,4)'. It then shoots up from 4 and doesn't stop, so next to your first increase you'll write '(4,*inf*)' and that's how you do it. Just remember class; only X values."
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