Relations and Functions

Which of the following sets of ordered pairs is a function?

• {(0, 1), (0, 2), (0, 3), (0, 4), (0,5)}

• {(1, 2), (3, 4), (5, 6), (7, 8), (1, 9)}

• {(-2, 7), (7, -2), (-3, -9), (-4, -2), (3, 2)}

• none of the above

Tags

CCSS.8.F.A.1

Which kind of relation below is a function?

• many-to-many

• one-to-many

• many-to-one

• all of the above

Tags

CCSS.8.F.A.1

"All functions are relation, but not all relations are function".

Is the statement is CORRECT?

• Yes

• No

• Partly no

• Partly yes

Tags

CCSS.8.F.A.1

Which of the following statements is TRUE?

• every relation is a function

• every function is a relation

• not all functions are relations

• all functions are not relations

Tags

CCSS.8.F.A.1

Relations can be illustrated using the following, EXCEPT:

• rule

• graph

• table

• shape

Tags

CCSS.8.F.A.1

Nico Robin, a grade 8 student loves to share snack with her closest friends as shown through these pairs: {(Sanji, sandwich), (Nami, sandwich), (Zoro, sandwich)}.

Which of the following kinds of relation best describe the given set?

• many-to-many

• many-to-one

• one-to-many

• one-to-one

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Brook rents a computer at an internet cafe. He has to pay a fixed amount of P10 and an additional cost of P15 per hour of rent time that he extended. Which is the correct mathematical model of the situation?

• f(x) = 15x + 10

• f(x) = 15x – 10

• f(x) = 10x + 15

• f(x) = 10x - 15

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Is the rule "x = –y² + 5" a function?

• Yes

• No

• Partly yes

• Partly no

The rule 5x + y = 3 represents a relation. What would be the value of y when x = –3?

• 18

• 12

• –12

• –18

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Determine which rule below represents a function.

• y = + or - √3x²/4 + 9

• x + y = 10

• y³ = -2x - 7

• 2x² + y² = 8