Functions Between Two Quantities

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

Which is the graph of y= -x + 2?

• A

• B

• C

• D

What type of slope does the graph have?

• Zero

• Undefined

• Negative

• Positive

Is this graph a function or not a function? 

• Function

• Not a Function

• A
• B
• C
• D

What is the definition of function? (a)  

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Which pizza place pays the best salary per pizza delivered? How many pizzas would the pizzeria need to deliver to make at least $ 100 dollars in one night? Write the equation of each Pizzeria salary scale.

• Bombino's

  21 pizzas

  f(x)= 56x+2.5

• Little Squeezers

  20 pizzas

  f(x)= 3x+48

• Little Squeezers

  15 pizzas

  f(x)= 48+9x

• Bombino's

  18 pizzas

  f(x)= 2.5x+56

If f(18) = 7(18) + 40 which function gives an appropriate representation of f(x)?

• f(x) = 7x

• f(x) = 18

• f(x) = 7x + 40

• f(x) = 18x + 40

• A.
• B.
• C.
• D.

Sam joins a chocolate club for $22.  He pays $0.35 per ounce of chocolate after he has paid the membership fee. What function represents this situation?

• f(x) = 0.35y + 22

• f(x) = 0.35x - 22

• f(y) = 0.35x + 22

• f(x) = 0.35x +22