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- Slide: 1
- 23y
- Michael, write the inequality on the board as an interval and in set notation. Then determine whether it would be a closed or open circle
- uhmmm.......
- Slide: 2
- 23y
- Because Micahel never paid attention in class, he had no idea what to do.
- Michael, write the inequality on the board as an interval and in set notation. Then determine whether it would be a closed or open circle
- uhmmm.......
- Slide: 3
- 23y
- But luckily Mia, who's very passionate about math was able to help him and answer the problem.
- Michael, write the inequality on the board as an interval and in set notation. Then determine whether it would be a closed or open circle
- uhmmm.......
- Slide: 4
- 23y
- Of course Mia! Go ahead.
- Ms. Simeon, may I help and do the problem?
- I'm literally confused
- Slide: 5
- Closed Circle
- Open Circle
- Inequality: 23y
- _ , _[ , ]
- , ( , )
- Mia: Here are some notes to keep in mind.
- Inequality:Interval:
- positive or negative infinity is always parentheses for intervals
- Slide: 6
- Inequality: 23y
- Mia: Let's first establish if its an open or closed circle. This will help us know all the symbols we will be using. " , "= closed Circle.
- Slide: 7
- Interval notation:(-infinity, 23)
- Inequality: 23y
- Mia: Think of it like this if the alligators mouth or inequality sign is facing the number that mean that the variable is less than the number. There's no line under the mouth so y cannot be 23.
- Slide: 8
- Inequality: 23y
- Interval:(-infinity, 23)
- Set Notation: {y I y23}
- Mia: So now for set notation you are just using the inequality but adding a few things, curly brackets { , }.
- Slide: 9
- 23yclosed circle(-infinity,23){yIy23}
- WOW!!
- I actually understand now! Thank you Mia.
- Mia, sweetie, you did an amazing job and explained everything so clearly. Are you trying to take my job? HAHAHA
- And that's how it's done!
- Slide: 0
- Mia: When writing an interval always write the numbers from least to greatest. In this case y would go first because it's less than 23, but y is not a number so in its place would be negative infinity because any number less than 23 could be y!
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