8TH GRADE 6.3 ON YOUR OWN

Jeffrey is shopping for a new phone. He needs a phone as well as a data plan.

He is deciding between the to options shown:

Which option has the lower initial value (Option 1 or Option 2)

EXPLAIN in complete sentences

Jeffrey is shopping for a new phone. He needs a phone as well as a data plan.

He is deciding between the to options shown:

Which option has the lower constant rate of change? (Option 1 or Option 2)

EXPLAIN in complete sentences

Toni is deciding whether to subscribe to app A or app B for streaming music.

App A offers listeners a $4 startup fee PLUS $0.15 per song.

App B offers listeners no startup fee and charges $0.40 per song.

Which app has the greater initial value?

• App A

• App B

• Neither

• Both

Toni is deciding whether to subscribe to app A or app B for streaming music.

App A offers listeners a $4 startup fee PLUS $0.15 per song.

App B offers listeners no startup fee and charges $0.40 per song.

Which app has the greater rate of change?

• App A

  $0.40 per song

• App A

  $0.15 per song

• App B

  $0.40 per song

• App B

  $0.15 per song

Toni is deciding whether to subscribe to app A or app B for streaming music.

App A offers listeners a $4 startup fee PLUS $0.15 per song.

App B offers listeners no startup fee and charges $0.40 per song.

Toni wants to purchase 20 songs per month.

Which app should she choose? EXPLAIN IN COMPLETE SENTENCES

The graph shows the value of a comic book over time after a collector buys it.

Is the rate of change POSITIVE or NEGATIVE?

Choose the answer that best identifies the meaning of the rate of change for this graph:

• POSITIVE

  it means that the value of the comic book INCREASES over time

• POSITIVE

  it means that time INCREASES over time

• NEGATIVE

  it means that the value of the comic book DECREASES over time

• NEGATIVE

  it means that time

  DECREASES over time

The graph shows the value of a comic book over time after a collector buys it.

What is the SLOPE of this line?

• m = 1/2

• m = 2

• m = -2

• m = - 1/2

The graph shows the value of a comic book over time after a collector buys it.

Use the equation of this line to find the value of the comic book after 25 years

• $25

• $50

• $30

• $60

The graph shows the value of a comic book over time after a collector buys it.

WRITE THE EQUATION OF THIS LINE IN

y = mx + b

FORM

The graph shows the value of a comic book over time after a collector buys it.

What does the point (15, 40) mean in the context of this linear function?

AFTER ​ (a)   YEARS, THE COMIC BOOK IS WORTH ​ (b)   DOLLARS​

• 15
• 40
• 10
• 20
• 30