TEKS.MATH.9-12.VII.C

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

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TEKS.MATH.7.4D

TEKS.MATH.9-12.VII.C

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x
• y=30(5000)^x
• y=5000(1.3)^x
• y=5000x^x

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TEKS.MATH.9-12.VII.C

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 14 when x = 6. 

• y=20x
• y=84x
• y=7/3x
• y=3/7x

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TEKS.MATH.9-12.VII.C

Write a rule :  Miles has joined a weight loss program.  His weight is 225 lbs and he is losing weight at a rate of 3 lbs per week.

• y = 222 x
• y = 225 + 3 x
• y = 225 - 3x
• y=225x - 3

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TEKS.MATH.9-12.VII.C

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation?

• y=8(15,000)^x
• y=15,000(1.08)^x
• y=15,000(0.92)^x
• y=15,000(0.08)^x

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TEKS.MATH.9-12.VII.C

The Henley's took out a loan for $195,000 to purchase a home. At a 4.3% interest rate compounded annually,how much interest will they  have paid after 30 years?

• $412,749.79      Labor Day
• $429,305.61            the 4th of July
• $471,259.24  Groundhog Day
• $494,546.99 Valentine’s Day

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TEKS.MATH.9-12.VII.C

There are 5 original students that started at Texas Tech in 1923, each year the campus grew triple the size of the previous year, whats the function?

• y=(1/3)5^x
• y=5(1/3)^x
• y=5(3)^x
• y=3(5)^x

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TEKS.MATH.9-12.VII.C

The sequence below shows the number of trees a nursery plants each year. 2, 8, 14, 20… Which formula could be used to determine the number of trees the nursery will plant next year, NEXT, if the number of trees planted this year, NOW is known? 

•  NEXT = 4 + NOW
• NEXT = 4 ∙ NOW
•  NEXT = 4 ∙ NOW + 2
• NEXT = NOW + 6

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TEKS.MATH.9-12.VII.C

Payments can be made in the future.

• Debit Card

• Credit Card

• Stored Value Card

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TEKS.MATH.9-12.VII.C

The amount of money earned on a job is directly proportional to the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265

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TEKS.MATH.9-12.VII.C