Math 8 - Chapter 4 Quiz

Question 1B Part 1

Carol’s profit for bracelets sold is represented by the function f(x) = 5x – 15, where x is the number of bracelets sold.

What is the rate of change?

• -$15 per bracelet

• $5 per bracelet

• $15 per bracelet

Tags

CCSS.HSF.IF.B.4

Question 1B Part 2

Carol’s profit for bracelets sold is represented by the function f(x) = 5x – 15, where x is the number of bracelets sold.

What is the y-intercept?

• $15 starting cost

• $5 per bracelet

• $15 starting profit

Tags

CCSS.HSF.LE.B.5

Question 1B Part 3

Kate’s profit is shown in the table. What is Kate's y-intercept?

Hint: Find y when x = 0.

• 15

• 10

• 5

• 0

Tags

CCSS.HSF.LE.B.5

Question 1B Part 4

Kate's profit is shown in the table. What is Kate's rate of change?

Hint:

 $R.O.C.\ =\ \frac{\Delta y}{\Delta x}$  

• $15 per bracelet

• $10 per bracelet

• $5 per bracelet

• $1 per bracelet

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

Question 1B Part 5

Compare the rates of change.

Carol

f(x) = 5x – 15

Kate

g(x) = 5x + 0

• Carol has the greater rate of change.

• Kate has the greater rate of change.

• They have the same rate of change.

• None of the above.

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

Question 1B Part 6

Compare the y-intercepts.

Carol

f(x) = 5x – 15

Kate

g(x) = 5x + 0

• Carol initially spent $15 more than Kate did.

• Carol initially earned $15 more than Kate did.

• They have the same y-intercept.

• None of the above.

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

Question 2B Part 1

Mary needs to rent a truck. The cost to rent a truck from Cross Town Movers is shown in the graph. How much does Cross Town Movers charge for 40 miles?

• $35

• $45

• $50

Tags

CCSS.HSF.LE.B.5

Question 2B Part 2

Mary needs to rent a truck. The cost to rent a truck from Company B is shown in the table. How much would Company B charge for 40 miles?

• $80

• $85

• $90

• $100

Question 2B Part 3

Mary needs to rent a truck. The cost to rent a truck from 2 different companies is shown in the table and graph. Which company costs less if she uses the truck for 40 miles?

• Cross Town Movers

• Company B

• Either A or B because they charge the same price

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

Question 3B Part 1

A zoo charges a rental fee plus $2 per hour for strollers. The total cost for 5 hours is $13. Assume the relationship is linear. Find and interpret the rate of change.

• The rate of change is $3.

• The rate of change is 5 hours.

• The rate of change is $2 per hour.

• The rate of change is $13.

Tags

CCSS.HSF.LE.B.5