*Unit 2: Video Notes - Introduction to Functions

Introduction to Functions


Watch each video and take notes on your guided notes sheet. If extra information or examples are given those should also be recorded.

In order to get the most out of the videos and notes, please LISTEN to the video and make a note of any vocabulary or examples you do not understand so that you can ask questions in class. Remember the video are available to reference back to as needed.

Multiple Choice

To get the most benefit out of the videos I should......

• watch a portion then take notes

• watch captions and try to take notes at the same time

• Listen without sound

• Set on faster speed just to get it done.

Multiple Select

Are all relations functions?

• All relations are functions.
• No, not all relations are functions.
• Some relations are always functions.
• Every function is a relation.

Multiple Select

Which of the following is another word for domain?

• input

• output

• independent variable

• x value

Multiple Select

What is another word(s) for range?

• dependent variable

• independent variable

• y value

• output

Multiple Choice

How do you identify a discrete graph?

• A discrete graph is represented by a smooth curve connecting all points.
• A discrete graph consists of a single continuous line without breaks.
• A discrete graph is identified by overlapping points that form a solid shape.
• A discrete graph is identified by distinct, separate points without continuous lines connecting them.

Multiple Choice

What is a continuous graph?

• A continuous graph can be drawn in segments without connecting them.
• A continuous graph consists of only straight lines.
• A continuous graph is a graph that is unbroken and can be drawn without lifting the pencil.
• A continuous graph is a type of pie chart.

Multiple Choice

Is the relation a function? 
{(4,5), (4,-7), (4,2), (4,0), (4,9)}

• Yes
• No

Multiple Choice

Is this mapping a function or not a function? 

• Function
• Not a Function 

Multiple Choice

Is this table a function or not a function? 

• Function
• Not a Function

Multiple Choice

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Multiple Choice

Is relation shown a function?

• YES
• NO

Multiple Select

What is the domain?

• ( -4 , 4 )

• [ 1 , -3 )

• -4 < x < 4

• 1 ≥ y > -3

Multiple Select

What is the range?

• [ -2 , 2 )

• [ 1, 5)

• -2 ≤ x < 2

• 1 ≤ x < 5

Multiple Choice

What is the range of the table?

• {-4, 0, 1, 3}

• {-2, 0, 2, 3}

• {-4, -2, 0, 1, 2, 3}

• { (0, 0), (2, -4), (3, 3), (-2, 1) }

Multiple Choice

Which image is NOT the graph of a function?

Multiple Choice

Is this graph a function or not a function? 

• Function
• Not a Function

Multiple Choice

Is this graph a discrete or continuous graph?

• discrete

• continuous

Multiple Choice

Is this mapping a function or not a function? 

• Function
• Not a Function 

Multiple Choice

Is this graph a function or not a function? 

• Function
• Not a Function

Multiple Choice

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Poll

How do you feel about the material in the video?

• I got it!

• Confused!

• Just Ok!