Practice Page
Directions: Answer these questions pertaining to exponential functions. Choose the best answer.

1.
Given y = 3x, evaluate y when x = 3.
       Choose:
 
3
6
  9 27



2.
Given y = 2x, evaluate y when x = -4

Choose:
4
16
1/16 -1/8



3.
Which of the following values is an acceptable value for b if y = abx is an exponential function?
       Choose:
 
-1
1
 
0
2



4.
What is the y-intercept for the function y = 2x ?
       Choose:
 
(1, 0)
(0,1)
 
(0,2)
(2,0)



5.
The graph of y = 2x lies in which Quadrants?
       Choose:
 
I, II
1I, III
 
I, IV
II, IV



6.
The graph y = 2x contain which of these points?

Choose:
(0,1)
(1,2)
(-1, ½)
All the points.



7.
What is the domain of the function y = 2x ?
Choose:
All Real Numbers
x > 0
y > 0
x > 1



8.
Which choice describes the exponential function shown by the graph?  
       Choose:
 
increasing, y-intercept at 90
  increasing, y-intercept at 100
  decreasing, y-intercept at 90
  decreasing, y-intercept at 100



9.
Which graph depicts y = 3x + 2?
       Choose:
 


 



10.
The exponential functions, A: y = 2x and B: y = 6x, are graphed on the same set of axes. Which of the following choices is true?  
 
 
       Choose:
 
Both functions have a y-intercept of (0,1) and function A is steeper that function B.
  The y-intercept of function A is (0,1) and the y-intercept of function B is (0,6).
  Both functions have a y-intercept of (0,1) and function B is steeper that function A.
  Both functions have the same rate of change between one and three on the x-axis.



11.
Which statement is true about the graph of
y = (0.5)x ?
       Choose:
 
The graph is always increasing.
  The graph is always decreasing.
  The graph has an x-intercept at x = 1.
  The graph passes through the point (1,0).



12.
Which point will the graph of y = kx pass through?
       Choose:
 
(1, k)
(0, k)
 
(k, 0)
(k, 1)



13.
The graph of y = 2x intersects
       Choose:
 
the x-axis only
  the y-axis only
  the x-axis and the y-axis
  neither the x-axis nor the y-axis



14.
What is the y-intercept of the function f (x) = 2(3)x ?
       Choose:
 
(0,1)
(0,2)
 
(0,3)
(0,4)



15.
What is the domain of the function f (x) = 2(0.5)x ?
       Choose:
 
x > 2
x > ½
 
x > 0
All Reals



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