Identify Functions Using Sets of Ordered Pairs, Tables, Mappings, and Graphs

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

Using the vertical line test, determine if the graph above shows a relation, a function, both a relation and a function, or neither a relation or a function.

• Neither a relation or a function

• Relation only

• Both a relation and a function

• Function only

Which of these tables represents a function?

• W

• Y

• Z

• X

Which of these graphs represents a function?

• Z

• W

• X

• Y

Which relation diagram represents a function?

• W

• X

• Y

• Z

Which of these graphs represents a function?

• Y

• X

• Z

• W

What is the range of the function shown?

• {-5, -3, -1, 3, 5}

• 3 ≤ y ≤ 6

• -5 ≤ x ≤ 5

• {3, 6}

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}

• {(2,7), (3,7), (4,7), (5,8)}

• {(1,-5), (-1,6), (1,5), (6,-3)}

• {(3,-2), (5,-6), (7,7), (8,8)}

All functions must...

• never have repeating y-values

• never have repeating x-values

• show a relationship between x- and y-values

• have a y-value for every one x-value

In the relation:{ (2,6), (4, 9), (6, 12) } Which numbers make up the domain?

• 2

• 6

• 9

• 4

• 12