Finding Function Rules

Q1. How much is the total cost?

• 8 cents

• 50 cents

• 40 cents

• 45 cents

Give the coordinates to graph the function:
y = |x + 5| + 1
^{D: {-2, -1, 0, 1, 2}}

• {(-2,4), (-1,5), (0,6), (1,5), (2,4)}

• {(-2,8), (-1,7), (0,6), (1,7), (2,8)}

• {(-2,6), (-1,5), (0,6), (1,7), (2,8)}

• {(-2,4), (-1,5), (0,6), (1,7), (2,8)}

Evaluate each function for the given inputs.
For f(x) = -2x + 4,
find f(x) when x = -5

• f(-5) = -6

• f(-5) = -3

• f(-5) = 14

• f(-5) = 2

Determine the relationship. Write an equation.
X:     1,    2,    3,    4
Y:   -6,  -5,  -4,  -3

• y = x - 7

• y = -7x

• y = 7 - x

• No Relationship

Erika has a savings account that has $125. She starts saving $5 per week for a new iPhone. Write a function to represent the total amount Erika has in her savings account. How much money will she has after 10 weeks?

• f(x) = 125x + 5

• f(x) = 5x + 125

• f(x) = 125x - 5

• f(x) = 5x - 125

A local parking garage charges $5.00 for the first hour plus $1.50 for each additional hour or part of an hour. Write a relation where x represents the hours, and y represents the cost. Is it a function?

• y = 1.50x + 5
  Function

• y = 5x + 1.50
  Function

• y = 1.50x + 5
   Not a Function

• y = 5x + 1.50
  Not a Function

Give the domain and range. Tell if it is a function.

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

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

• D: {-4, -2, 0, 2}
  R: {-2, -2, 1, 1}
  Not a Function

• D: {-4, -2, 0, 2}
  R: {-2, 1}
  Not a Function

Give the domain and range. Tell if it is a function.

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

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

• D: {-4, -2, 0, 2}
  R: {-2, -2, 1, 1}
  Not a Function

• D: {-4, -2, 0, 2}
  R: {-2, 1}
  Not a Function

Write an equation to represent the table.

• y = x + 6

• y = 2x

• y = x + 5

• y = x - 5

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