Math Functions

Which equation matches the table?

• y = x 

• y = 5x

• y = x - 4

• y = x + 4

Which function is linear?

• y = 2x + 4

• y = 2x² + 4

• y = 2x(4 − 3x)

• xy = 15

Is this set of ordered pairs a function and how can you tell?

• Yes its a function because no y values repeat

• No it's not a function because there are negative numbers

• No it isn't a function because an x value repeats but has different y values 

• No it isn't a function because an y value repeats but has different x values

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (5, -7) (1, 4)

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because the x-value 11 has two y-values pair with it.

• No, because each x-value has only one y-value paired with it.

Which of the following represents a function?

The mapping ​ (a)   y as a function of x, because ​ (b)  

• does not represent

• does represent

• each x-value corresponds to more than one y-value

• each x-value corresponds to only one y-value

• Function
• Not a Function

Select the correct independent and dependent parts of the graph .

(choose 2 answers)

• The dependent variable is total cost

• The dependent variable is weight

• The independent variable is total cost

• The independent variable is the weight of the package

• the independent variable is distance
• the independent variable is d=25 t
• the dependent variable is time
• the dependent variable is distance