College Algebra Set Notation

1.11: Set Notation

Today we will discuss roster form, set builder notation, and interval notation.

Multiple Choice

Which inequality represents all real numbers that are greater than 2?

• $$x<2$$

• $$x\le2$$

• $$x>2$$

• $$x\ge2$$

Multiple Choice

Which inequality represents all real numbers that are greater than -3 and less than or equal to 5?

• $$5\le x<-3$$  
  

• $$5<x\le-3$$  
  

• $$-3\le x<5$$  
  

• $$-3<x\le5$$  
  

Open Ended

How do we know when to use  $$<$$   and when to use

$$\le$$  ?

Multiple Choice

Which solution set represents the number line pictured here?

• $$-3<x<4$$

• $$-3\le x<4$$

• $$-3<x\le4$$

• $$-3\le x\le4$$

Multiple Choice

Which is the solution in interval notation?

• (-3,4)

• [-3,4)

• (-3,4]

• [-3,4]

Poll

Now that we have done a live quizziz lesson, which do you prefer?

• Doing the quizziz lesson that has video clips independently at my own pace.

• Doing the quizziz lesson in class live with the whole group together.