Practice for Quiz #2

The number of seats in a performing arts theater determines how many tickets can be sold for the local high school musical.

s = the number of seats in the theater

t = the number of tickets that can be sold for the performance

Which of the variables is independent and which is dependent?

• s is the independent variable and

  t is the dependent variable

• t is the independent variable and

  s is the dependent variable

Angie is organizing a martial arts tournament and is ordering trophies for the winners. The more divisions there are in the tournament, the more trophies Angie needs to order.

d = the number of divisions in the tournament

t = the number of trophies Angie orders

Which of the variables is independent and which is dependent?

• d is the independent variable and

  t is the dependent variable

• t is the independent variable and

  d is the dependent variable

Diane and Emir are preparing meals to serve at a local homeless shelter. The number of people they will be able to serve depends on the number of meals they prepare.

p = the number of people Diane and Emir will be able to serve

m = the number of meals Diane and Emir prepare

Which of the variables is independent and which is dependent?

• p is the independent variable and

  m is the dependent variable

• m is the independent variable and

  p is the dependent variable

What is f(4)?

 $f\left(x\right)\ =\frac{1}{2}x+1$  

• 3

• 6

• 1

• 1/2

When f(x) = -2x - 2, what is f(-1)?

• -4

• 0

• -5

• 4

When f(x) = 2x, what is the domain when the range is 4?

• 4

• 2

• 0

• 8

When y = -3x + 4, what is x when y is 10?

• -26

• -2

• 14/-3

• 4

What are the RANGES of the function: f(x) = 3x -2 when

D = {-3, 1}

• -2

• 1

• 7

• -11

• -1/3

A plumber charges $70 per hour plus $40 for the call.

Write a function in function notation.

• f(x) = 70x + 40

• f(x) = 40x +70

• f(x) = 40 +70

• f(x) = 110x

Oranges are on sale for $1.59 per pound.

Write a function in function notation.

• f(x) = 1.59

• f(x) = 1.59 - x

• f(x) = 1.59 + x

• f(x) = 1.59x