Is a Function

Which set of coordinates represent a function? (Select all that apply)

• {(1,1), (2,2), (3,3), (4,4), (5,5)}

• {(1,5), (2,4), (3,3), (4,2), (5,1)}

• {(3,6), (4,7), (5,8), (6,9), (4,0)}

• {(-2,0), (0,-2), (3,-5), (-5,3), (10,-6), (-6, 10)}

Which tables represent functions? (Select all that apply!)

• 
• 
• 
• 

When deciding whether a relation represents a function.....

• x and y values cannot repeat

• x values cannot repeat

• y values cannot repeat

• x and y values can repeat

This mapping does not represent a function.

Why not?

• Because two inputs (-3 & -2) result in the same output (7)

• Because one of the inputs (-3) can result in two outputs (5 & 6)

• Because the arrows don't cross

• Because the inputs are negative put the outputs are positive

Is this table a function or not a function? 

• Function

• Not a Function 

Which IS a function?

• 1

• 2

• 3

• 4

Is the relation a function?

{(1,5), (1,7), (3,9), (4,11)}

• Yes

• No

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

• Yes its a function because no y values repeat

• No it isn't a function because an x value repeats

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

• Yes it is a function because no x values repeated

• No it isn't a function because an x value repeated

Which example is NOT a function?

• Example 1

• Example 2

• Example 3