Representing, Naming, and Evaluating Functions

Let 𝒇(𝒙) = 𝟔𝒙 − 𝟑, and let 𝒈(𝒙) = 𝟎.𝟓(𝟒)^𝒙 . Find the value of each function for the given input:

𝒇(𝟔) − 𝒇(-𝟐) = ?

−6⋅f(−3)−5⋅g(−7)=

Let 𝒇(𝒙) = 𝟔𝒙 − 𝟑, and let 𝒈(𝒙) = 𝟎.𝟓(𝟒)^𝒙 . Find the value of each function for the given input:

𝒈(1) - 𝒈(2)

Evaluate y = 4x - 1 when x = 10.

• 39

• 41

• 399

• 38

Identify the domain of the following relation:

• {-6, 14, 2, 28}

• {(-6,14), (0,32), (2,38), (4,44)}

• {-6, 0, 2, 4}

• {14, 32, 38, 44}

What is the range?

• {-3, -1, 2, 4}

• {0, 4, 7} 

• {0, 4, 4, 7}

• {7, 4, 0}

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}

• D: {-4, 0, 1, 2}
  R:{-4, -3, 1}

• D: {0, 1, 2, 3, 4}
  R:{1, -3, -4}

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

The grocery store sells cantaloupes for $4.50 per pound.  Write a function to represent the cost, c, for the number of pounds of cantaloupes bought, p.

• c = 45p

• c = 4.5p

• p = 4.5c

• p = 45c

Pablo has $12. He earns $7 for every lawn he mows. Write an equation to find the amount of money "y" he will have after "x" number of lawns.

• y = 12x + 7

• y = 7x + 12

Evaluate f(-2) if f(x) = x+3

• -1

• 1

• 5

• -5