Topic 3 Practice Test

• A

• B

• C

• D

Answer explanation

The 7 appears more than once. For it to be a function, the X-values can NOT repeat!

Tags

CCSS.8.F.A.1

Domain: ____

Answer explanation

The x-values are the DOMAIN.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Range: ____

Answer explanation

The y-values are the RANGE.

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Answer explanation

f(x)=

Answer explanation

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

• a

• b

• c

• d

Answer explanation

f(24)=3(24)+65

f(24)=72+65

f(24)=137

Tags

CCSS.6.RP.A.3B

• a

• b

• c

• d

Answer explanation

g(x)=f(2x) means the equation for g(x) will be the same equation as f(x) except only the x is multiplied by 2.

Is the graph a function?

• Yes

• No

Answer explanation

All the x-values have their own y-value.

What is the domain?

• Domain: all real numbers

• Domain: only integers

Answer explanation

The domain is the x-values and the line starts at -3 on the x-axis. The line then continues forever (indicated by the arrow).

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5