Functions and Graphs

How can you determine if a table or ordered pairs represents a function?

• for every y-value there is only one x-value

• for every x-value there is only one y-value

• vertical line test

• for every x-value there is more than one y-value

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)

Which ordered pair could you add to the following list of points to create a function?  (3, 5) (4, 9) (2, 5) 

• (3, 7)

• (4, 1) 

• (1, 9)

• (2, 6)

Does this represent Y as a function of X?

• Yes

• No

• oohhh.....Spider Webbs!

Does this represent a function?

• Yes

• No

Is this graph a function or not a function? 

• Function

• Not a Function

Is the graph pictured a function?

• Yes

• No

Which point is on the graph?

• (0,0)

• (-2, -2)

• (0, 2)

• (2, 0)

Which ordered pair is a solution of
the equation
y = 6x?

• (12, 2)

• (4, 18)

• (3, 18)

• (6, 1)

Which ordered pair is a solution of
the equation y=(1/2)x?

• (1, 2)

• (4, 1)

• (3, 6)

• (6, 3)