Relation and Functions

Which is not a function?

• Students and their LRN

• Teachers and the students

• People and their fingerprints

• People and their Driver's License

Which among the graph is an example of a function?

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• 
• 
• 

It is a rule that relates values from a set of a values (domain) to a second set of values (range) or simply a set of ordered pairs (x,y).

It is a relation where each element in the domain is related to only one value in the range by some rule.

• Domain

• Relations

• Functions

• Range

What is the domain of  $y=\sqrt{2-x}$  ?

• The domain are the set of all real numbers where  $x\le2$  

• The domain are the set of all real numbers where $x\ne2$  

• The domain are the set of all real numbers where  $x\ge2$  

• The domain are the set of all real numbers where  $x<2$  

Which of the relations below is a function?

• {(2, 3), (3, 4), (5, 1), (2, 4)}

• {(2, 3), (3, 4), (6, 2), (7, 3)}

• {(2, 3), ( 3, 4), (6, 2), (3, 3)}

Which of the following letters will pass the vertical line test?

• V

• W

• X

• Y

True or False: A graph represents a function if and only if each vertical line intersects the graph at most once.

• TRUE

• FALSE

Give a function C that can represent the cost of buying x meals, if one meal costs P40.00.

• C(x)=40

• C=40x

• C(x)=40x

• C(x)=40+x

Which of the relations below is a function?

• {(1, 1,), (2, 1), (3, 1), (4, 1), (5, 1)}

• {(2, 1), (2, 2), (2, 3), (2, 4), (2, 5)}

• {(0, 2), (0, 3), (0, 4), (0, 5), (0, 6)}

Tags

CCSS.8.F.A.1