Test 13 Review: domain/range/continuous/discrete

Given the function f(x) = 4x - 7, which of the following values is not part of the range?

• -7

• 0

• 5

• 25

What is the domain of the mapping?

• {-5, 0, 2, 7}

• {-3, 2, 6}

• -3 < x < 6

• x > -3

You purchase a cell phone for $1100. The value of the cell phone decreases by about 20% annually. Identify the function that models the price of the cell phone over time.

• f(x) = 1100 (1 - 20)^t

• f(x) = 1100(.20)^t

• f(x) = 1100 (1.20)^t

• f(x) = 1100 (.80)^t

Given the function f(x) = 4x - 7,  

       what is the range if the domain is

       equal to -3 ?

• -19

• 1

• 5

• none of these

Which statement is true about the graph?

• The domain is: x > 2

• The domain is all real numbers

• The range is all real numbers

• The range is : y < 2

Which value of "x" would simplify this equation correctly?

(-3c³)^x = 81x¹²

• x = 9

• x = 4

• x = 2

• x = 0

What is the domain and range of the discrete function?

• D: {-1, 2, 5}

  R: {1, 2, 4}

• D: {1, 2, 4}

  R: {-1, 2, 5}

• D: -1 < x < 5

  R: 1 < x < 4

• D: all real numbers

  R: all real numbers

Which relationship best represents a function?

• 
• 
• 
• f(-3) = 4

  f(2) = 4

  f(5) = 4

Simplify: (4x^-3y)²