Unit 5B Test Review

The cost, in dollars, of printing n digital photos is f(n)= 3.50+0.20n. Which of the following statements is correct?

• For each additional photo printed, the cost increases by $3.50

• For each additional photo printed, the cost increases by $0.20

• For each additional photo printed, the cost increases by $3.70

• For each additional photo printed, the cost increases by $0.50

Which function describes the table?

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Which of the following functions has a range of y > 3

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Kimberly is a book editor. She uses the function c(x) = 4.50x to determine the amount he will charge, in dollars, to edit a book with x pages.

Which of the following statements BEST explains what the RANGE of Kimberly's function is?

• The range is all positive or negative multiples of 4.50 rounded to the nearest hundredth bc the amounts charged are represented as dollars and cents.

• The range is all positive whole numbers because the book must have positive, whole number of pages.

• The range is all positive multiples of 4.50 rounded to the nearest hundredth bc the amounts charged are represented as dollars and cents.

• The range is all integers because the book must have positive or negative, whole number of pages.

Use the table to answer the following question.

Which of the following function represents this sequence?

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Which of the following statements is FALSE?

• Both functions f(x) and g(x) have the same value at x = 1

• the y - intercept of f(x) is less than the y - intercept of g(x)

• Both functions have a range of all real numbers

• f(3) > g(2)

The first five terms of a sequence are shown.

4, 8, 16, 32, 64, ...

What is the common ratio and the explicit function?

• Common Ratio: 4

  a_n = 4(2)^n-1

• Common Ratio: 2

  a_n = 4(2)^n-1

• Common Ratio: 8

  a_n = 4(8)^n-1

• Common Ratio: 2

  a_n = 2(4)^n-1

Explain what this value stands for in context of the problem.

• 2.50; the amount the cost increases for each mile driven

• 5.00; the amount the cost increases for each mile driven

• 2.50; the cost with no miles driven

• 2.00; the cost with no miles driven

Which of the following situations could be modeled by an exponential function?

• Water level of a pool increases by 10 gallons every day

• The amount of cell phone users increasing at a rate of 10% every year

• The amount of money collected by a charity increases by $500 every year.

• A tree was 10ft tall last year and grows at a rate of 1ft/year.

Solve for x.

   

• x = 2

• x = 1/2

• x = 5/2

• x = 2/5