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Algebra 2 Quiz 3 - Exponential Functions and Equations

Total questions: 15

Worksheet time: 29mins

Name
Class
Date
1.

Solve .
22x+3=1282^{2x+3}=128  

a)

-2

b)

−32-\frac{3}{2}  

c)

32\frac{3}{2}  

d)

2

2.

125x⋅252x+1=(15)x+6125^x\cdot25^{2x+1}=\left(\frac{1}{5}\right)^{x+6}  

Solve.

a)

−186-\frac{18}{6}  

b)

-1

c)

1

d)

186\frac{18}{6}  

3.


Solve. 
(18)3x=(18)x+6\left(\frac{1}{8}\right)^{3x}=\left(\frac{1}{8}\right)^{x+6}  


a)

1

b)

2

c)

3

d)

4

4.


Solve. 
45x+2=(164)4^{5x+2}=\left(\frac{1}{64}\right)  

a)

-2

b)

-1

c)

1

d)

2

5.


Solve. 
(1216)x−1=36x\left(\frac{1}{216}\right)^{x-1}=36^x  

a)

-1

b)

−35-\frac{3}{5}  

c)

35\frac{3}{5}  

d)

1

6.

What is the y-intercept of the function?

a)

1

b)

2

c)

4

d)

3

7.

What is the range of  f(x)=2x+1−3f\left(x\right)=2^{x+1}-3  ?

a)
(-∞,∞)
b)
(-3, ∞)
c)
(-1, ∞)
d)
(-∞, -3)
8.
Is this exponential growth or decay?
a)
Growth
b)
Decay
9.
What is the domain of f(x) = 5x?
a)
-∞ ≤ x ≤ ∞
b)
-∞ ≤ y ≤ ∞
c)
x > 0
d)
y > 0
10.

Given   f(x)= −3⋅2x−4−6f\left(x\right)=\ -3\cdot2^{x-4}-6  , what is the equation for the asymptote?

a)

y=-6

b)

y=6

c)

x=-6

d)

x=6

11.

Using the parent function f(x)=2xf\left(x\right)=2^x   , what would the graph of f(x)=−3⋅2x−4−6f\left(x\right)=-3\cdot2^{x-4}-6   look like?

a)

Reflect over x-axis, Vertical stretch by factor of 3, 4 right, 6 down.

b)

Reflect over x-axis, Vertical stretch by factor of 3, 4 right.

c)

Reflect over x-axis, Vertical compression by factor of 3, 4 right, 6 down.

d)

Reflect over x-axis, Vertical stretch by factor of 3, 4 left, 6 down.

12.

Given   f(x)= −3⋅2x−4−6f\left(x\right)=\ -3\cdot2^{x-4}-6  , what is the range?

a)

(−∞, −6)\left(-\infty,\ -6\right)  

b)

(−6, −∞)\left(-6,\ -\infty\right)  

c)

(−6, ∞)\left(-6,\ \infty\right)  

d)

(∞,−6)\left(\infty,-6\right)  

13.

Given   f(x)= −3⋅2x−4−6f\left(x\right)=\ -3\cdot2^{x-4}-6  , what is the y-intercept?

a)

(0, −6)\left(0,\ -6\right)  

b)

(0, −6.188)\left(0,\ -6.188\right)  

c)

(−6.188, 0)\left(-6.188,\ 0\right)  

d)

(−6, 0)\left(-6,\ 0\right)  

14.

Given   f(x)= −3⋅2x−4−6f\left(x\right)=\ -3\cdot2^{x-4}-6  , what is the end behavior?

a)

As  x→−∞,  f(x)→−6As\ \ x\rightarrow-\infty,\ \ f\left(x\right)\rightarrow-6  

As  x→∞,  f(x)→−∞As\ \ x\rightarrow\infty,\ \ f\left(x\right)\rightarrow-\infty  

b)

  As x→−∞, f(x)→−∞As\ x\rightarrow-\infty,\ f\left(x\right)\rightarrow-\infty   As  x→∞, f(x)→−6As\ \ x\rightarrow\infty,\ f\left(x\right)\rightarrow-6  

c)

  As  x→−∞,  f(x)→6As\ \ x\rightarrow-\infty,\ \ f\left(x\right)\rightarrow6   As x→∞, f(x)→∞As\ x\rightarrow\infty,\ f\left(x\right)\rightarrow\infty  

d)

  As x→−∞, f(x)→−6As\ x\rightarrow-\infty,\ f\left(x\right)\rightarrow-6   As  x→∞, f(x)→6As\ \ x\rightarrow\infty,\ f\left(x\right)\rightarrow6  

15.

Solve the exponential equation then choose the correct answer.

a)

A

b)

B

c)

C

d)

D