Review: Domain & Range of Linear Functions

What is the range of y = -2x + 7 if the given domain is {-1, 0, 1}

• {9, 5, 1}

• {9, 8, 7}

• {9, 7, 5}

• {12, 15, 17}

{(1,2), (3,4), (5,10)}
What is the domain?

• {1,2,3,4,5,10}
• {1,2,3,5}
• {2,4,10}
• {1,3,5}

What is the Domain?

• {-3, -1, 1, 3, 5, 7, 9}

• {-3, -2, -1, 0, 1, 2, 3}

• -3 ≤ x ≤ 3

• -3 ≤ x ≤ 9

• Discrete
  D: {0, 1, 2, 3,...40}
  R: {-240, -228, -216,..240}

• Discrete
  D: {1, 2, 3,...39}
  R: {240, 241, 242,...560}

A holiday church's meal costs $12.50 a person plus a delivery fee of $30. The equation is: f(x)=30+12.5x, where x is the number of hungry people. If there are 15 people in the church, what is the domain?

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15

• 0, 42.50, 55, 67.50, 80, 92.50, 105, 117.50, ....

• None of the above.

Janice is working as a babysitter for the Harold Family.  They plan to leave for their date at 7:00 pm  and be back by 12:00 am.  If the equation f(x) = 15x + 20 models the amount that Janice will earn, where x is the number of hours she works, and f(x) is the total money she earns, what is an appropriate domain?

• any value between 0 and 5
• any value between 15 and 20
• any value between -1 and 1
• any value greater than 0

What is the domain of a function?

• the set of all x-values

• the set of all y-values

What is the Domain of the relation below:

• A) {-2, -1, 0, 1, 2}

• B) All real numbers.

• C) {-2, 0, 1, 3}

• D) {-1, 0, 1, 3}

Give the range of the set of ordered pairs: (2, 11), (9, -3), (7, 21), (-8, 6)

• $\left\{-8,\ 2,\ 7.9\right\}$

• $\left\{-3,\ 6,\ 11,\ 21\right\}$

• $-8<x<9$

• $-3<y<21$