Domain and Range

Domain and Range

left right and down up

Domain

• the x values only

• the input

• from left to right on a graph

• Example: My truck gets 20 miles per gallon and the tank holds 25 gallons.

• PER GALLON is the magic word. The miles driven depends on how much gas is used. Gallon is the "X".

• so the domain would be how much gas you use. 0 gallons all the way to 25 gallon

Range

• the "Y" values

• In "miles per gallon" the "Y" is the miles

• Miles depend on how much gas you use

• So Range would be how many miles you can drive

• If you use 0 gallons, you drive 0 miles

• If you use all 25 gallons, then you could drive a max of 500 miles.

Poll

How do you feel about the concept of domain and range?

• Got it

• I think I understand

• Still working on it

We will focus on Tables, Points, And Mapping diagrams today

• Remember, domain is x

• range is y

Multiple Choice

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain.
Remember:  Domain is x 
(x,y)

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}
• D:{0, 1, 2, -4}
  R:{1, -3, -4}
• D:{0, 1, 2, 3, 4}
  R:{1, -3, -4}

for the set of points,

• the domain is the x values

• and the range is the y values

• the first number of the point is the x

• the second number is the y

Multiple Choice

Identify the domain of the following relation:
Remember domain is the "x" values

• -6, 14, 2, 28
• (-6,14), (0,32), (2,38), (4,44)
• -6, 0, 2, 4
• 14, 32, 38, 44

Multiple Choice

What is the range?

• {-3, -1, 2, 4}
• {0, 4, 7} 
• {0, 4, 4, 7}
• {7, 4, 0}

Time for you to practice on your own

Go to google classroom and do 3-8

Good luck, you got this