Unit 6 Test Review Day 1

The table below represents the function F. The equation that represents this function is?

• F(x) = 3^x

• F(x) = 3x

• F(x) = 2^x +1

• F(x) = 2x + 3

Tags

CCSS.HSF.LE.A.2

Which situation could be modeled by a linear function?

• a bank account balance that grows at a rate of 5% per year, compounded annually

• a population of bacteria that doubles every 4.5 hours

• the cost of a cell phone service that charges a base amount plus 20 cents per minute

• the concentration of medicine in a person's body that decays by a factor of one-third every hour

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

Rhonda deposited $3,000 in an account in the Merrick National Bank, earning 4.2% interest, compounded annually. She made no deposits or withdrawals. Which equation can be used to find B, her account balance after t years?

• B = 3000(4.2)^t

• B = 3000(1 + .042)^t

• B = 3000(.042)^t

• B = 3000(.958)^t

Tags

CCSS.HSF.LE.A.2

Jake was given $3,000 when he turned 2 years old. His parents invested it at a 2% interest rate compounded annually. No deposits or withdrawals were made. Which expression can be used to determine how much money Jake had in the account when he turned 18?

• 3000(1 + .02)^16

• 3000(1 - .02)^16

• 3000(1 + .02)^18

• 3000(1 - .02)^18

Tags

CCSS.HSF.BF.A.2

Which table represents a linear relationship

• Table 1

• Table 2

• Table 3

• Table 4

Tags

CCSS.8.F.A.3

The value in dollars, v(x), of a certain car after x years is represented by the equation v(x) = 25000(0.86)^x. To the nearest dollar, how much more is the car worth after 2 years than after 3 years?

• $2,589

• $6,510

• $15,901

• $18,490

Some banks charge a fee on savings accounts that are left inactive for an extended period of time. The equation y = 5000(0.98)^x represents the value, y, of one account that was left inactive for a period of x years. What is the y-intercept of this equation and what does it represent?

• 0.98, the percent of money in the account initially

• 0.98, the percent of money in the account after x years

• 5000, the amount of money in the account initially

• 5000, the amount of money in the account after x years

Tags

CCSS.HSF.LE.B.5

A laboratory technician studied the population growth of a colony of bacteria. He recorded the number of bacteria every other day as shown in the partial table. Which function would accurately model the technician's table?

• f(t) = 25^t

• f(t) = 25^(t + 1)

• f(t) = 25t

• f(t) = 25(t + 1)

Tags

CCSS.HSF.LE.A.2

The function V(t) = 1350(1.017)^t represents the value, V(t), in dollars, of a comic book t years after its purchase. The yearly rate of appreciation of the comic book is?

• 17%

• 1.7%

• 1.017%

• 0.017%

Tags

CCSS.HSF-IF.C.8B

Tyler invested $600 in a savings account at a 1.6% annual interest rate. He made no deposits or withdrawals on the account for 2 years. The interest was compounded annually. Find, to the nearest cent, the balance in the account after 2 years?

• $1536

• $619.35

• $0.15

• $580.95