Which statement about $$f\left(x\right)=4x^2-36x+81$$ is true?

The only zero is $$\frac{9}{2}$$ because f(x)= $$\left(2x-9\right)^2$$

The zeros are $$\frac{3}{4}$$ and -27 because $$f\left(x\right)=\ \left(4x-3\right)\left(x-27\right).$$

The zeros are $$-\frac{3}{2\ }and\ \frac{27}{2}\ because$$ $$f\left(x\right)=\ \left(2x+3\right)\left(2x+27\right).$$

The zeros are $$\pm\frac{9}{2\ }\ because$$ $$f\left(x\right)=\left(2x-9\right)\left(2x+9\right)$$

Which statement about the function $$n\left(x\right)=5x^2-20x+12\ is\ true?$$

The range of the function is $$n\left(x\right)\ge-8.$$

The domain of the function is $$x\ge2.$$

The domain of the function is $$x\ge0$$

The range of the function is $$n\left(x\right)\le12.$$

Which statement about $$p\left(x\right)=-7\left(4\right)^x$$ is true?

the range is all real numbers less than 0

The domain is all real numbers greater than or equal to 4

the domain is all real numbers less than or equal to 0

Which statement appears to be true?

The equation of the axis of symmetry of the graph of the function is x=1

the maximum value of the function is 3

the vertex of the graph of the function is (4, 1)

which statement about the line is true?

The equation of the line is x= -4, and the slope is undefined.

the equation of the line is y=-4, and the slope is equal to -4

the equation of the line is x=-4, and the slope is equal to -4

the equation of the line is y=-4, and the slope is undefined.

The function $$w\left(t\right)=270\left(1.029\right)^t$$ can be used to estimate the number of whales in the North Atlantic ocean at the end of t years. What does 1.029 represent in this function?

The growth factor of the number of whales in the Atlantic Ocean

the initial number of the whales in the North Atlantic ocean

The decay factor of the number of whales in the North Atlantic Ocean

The number of whales in the North Atlantic Ocean at the end of the first year

What is the range of g?

All real numbers less than or equal to $$\frac{19}{4}$$

All real numbers less than or equal to $$\frac{3}{2}$$

All real numbers greater than or equal to $$\frac{3}{2}$$

All real numbers greater than or equal to $$\frac{19}{4}$$

2024 STAAR Review Heng

Authored by Souvuoch Heng

Mathematics

9th Grade

CCSS covered

Used 9+ times

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33 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which function represents this relationship?

Tags

CCSS.HSF.LE.A.2

CCSS.8.F.B.4

DRAG AND DROP QUESTION

1 min • 1 pt

The water level (a) at a rate of (b) m/h.

decrease

0.25

increase

Tags

CCSS.HSF.IF.B.4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tags

CCSS.HSF-IF.C.7A

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2.5

7.5

Tags

CCSS.8.EE.C.7B

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5x+4

3x-2

5x-4

3x-4

DROPDOWN QUESTION

1 min • 4 pts

The range is the set of all real numbers (a) (b) and (c) (d) .

greater than

Greater than or equal to

-4

-2

less than or equal to

less than

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

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2024 STAAR Review Heng

Which function represents this relationship?

The water level ​ ​ (a) at a rate of​ (b) m/h.

The range is the set of all real numbers ​ (a) ​ (b) ​ ​ and ​ (c) ​ (d) .

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The water level (a) at a rate of (b) m/h.

The range is the set of all real numbers (a) (b) and (c) (d) .