CCSS.Math.Content.8.F.B.4

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

Tags

CCSS.Math.Content.8.F.B.4

Emilio borrows $1200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

• 150
• 192
• 1350
• 1392

Tags

CCSS.Math.Content.8.F.B.4

Speedy Boat Rental charges a $15 deposit fee plus $2 for each hour of use to rent a paddle boat.  Write an equation for C, the total cost, to rent the boat for h hours.

• h = 2C + 15
• C = 15h + 2
• h = 15C + 2
• C = 2h + 15

Tags

CCSS.Math.Content.HSA.CED.A.1

CCSS.Math.Content.HSA.CED.A.2

CCSS.Math.Content.8.F.B.4

Circle with 1 diameter has 2 parts, 2 diameters have 4 parts, 3 diameters have 6 parts. Make a conjecture about a circle with 5 diameters. 

• It will have 10 parts
• It will have 25 parts
• It will have 5 parts
• It will have 50 parts

Tags

CCSS.Math.Content.8.F.B.4

What is the rate of change?

• 5
• 1/5
• 15
• 10

Tags

CCSS.Math.Content.8.EE.B.5

CCSS.Math.Content.8.F.B.4

Jerry has $20 and makes $7 per hour. Which equation represents the total amount of money Jerry has after working x hours?

• y = 7x + 20
• y = 7 + 20x
• y = 20 + 7

Tags

CCSS.Math.Content.8.F.B.4

Find the rate of change.

• -2 minutes per gallon
• -20 minutes per gallon
• -2 gallons per minute
• -20 gallons per minute

Tags

CCSS.Math.Content.8.F.B.4

What is the algebraic equation for this table?

• y = x + 3
• y = 3x
• y = x ÷ 3
• y = x - 3

Tags

CCSS.Math.Content.8.F.B.4

The table shows the number of gallons of gasoline in a car’s gas tank after the car has been driven x miles.

When these data are graphed on a coordinate grid, the points all lie on the same line. What are the slope and y-intercept of this line?

• Slope = 25, y-intercept = 375

• Slope = −25, y-intercept = 15

• Slope = −1/25, y-intercept = 15

• Slope = 1/25, y-intercept = 375

Tags

CCSS.Math.Content.8.EE.B.6

CCSS.Math.Content.8.F.B.4

If Joe worked 30 hours, how much is he expected to earn?

• $600
• $200
• $1000
• $800

Tags

CCSS.Math.Content.8.EE.B.5

CCSS.Math.Content.8.F.B.4