TEKS.MATH.9-12.VII.C.2

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.2

TEKS.MATH.9-12.VII.C

Daniel’s Print Shop purchased a new printer for $35,000. Each year it depreciates at a rate of 5%. How much will the printer be worth in 8 years?

• $23,219.72
• $136.72
• $51,710.94
• $16,710.94

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TEKS.MATH.9-12.VII.C.2

Find a polynomial function of degree 3 with zeros 3i and -2.

• P(x) = x³+2x²+9x+11
• P(x) = x³-2x²+9x+18
• P(x) = x³+2x²+9x+18
• P(x) = x²-3ix+2x-6i

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TEKS.MATH.9-12.VII.C.2

TEKS.MATH.9-12.II.B.1

The school shrunk the population of students not passing by a fourth after every 6 weeks. They started with fifty-two students not passing. what function represents this scenario? 

• y=6(52)^x
• y=52(4)^x
• y=4(6)^x
• y=52(¼)^x

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TEKS.MATH.9-12.VII.C.2

Write the explicit rule for this situation in simplified form.

• f(n) = −8n + 60
• f(n) = 8n + 44
• f(n) = −8n + 52
• f(n) = f(n − 1) − 8

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TEKS.MATH.9-12.VII.C.2

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

• y = 1.5x + 12
• y = 12x + 1.5
• y = 0.67x - 8
• y = -8x + 0.67

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TEKS.MATH.9-12.VII.C.2

TEKS.MATH.9-12.VII.C

Write a formula for the following sequence:

2, 8, 14, ...

• a_n = 2 + 6n

• a_n = - 6 + 6n

• a_n = 6n - 4

• a_n = 4 - 6n

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TEKS.MATH.9-12.VII.C.2

Alec consumes beverages at a rate of r(x)=10+.2x² beverages per hour, how many beverages does Alec drink in the first 16 hours?

• 25.068

• 433.067

• 5463.759

• Too many, Alec should seek medical attention

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TEKS.MATH.9-12.VII.C.2

Approximately what interest rate would be needed in order to grow Christian's investment of $1400 to $2500 in 10 years if the interest was compound monthly?

• 5.96%

• 5.84%

• 5.81%

• 5.88%

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TEKS.MATH.9-12.VII.C.2

Write an absolute value function given the following transformations:

Reflection across the x-axis

Horizontal shift right 2 units

Vertical shift down 7 units

• y = -|x + 2| - 7

• y = |x - 2| - 7

• y = -|x - 2| - 7

• y = -|x - 2| + 7

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TEKS.MATH.9-12.VII.C.2