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Example Questions
Example Question #5 : Transformations
Give the equation of the horizontal asymptote of the graph of the equation
.
The graph of does not have a horizontal asymptote.
The graph of does not have a horizontal asymptote.
Let . In terms of ,
, being a logarithmic function, has a graph without a horizontal asymptote. As represents the result of transformations of , it follows that its graph does not have a horizontal asymptote, either.
Example Question #61 : Graphs
Give the equation of the vertical asymptote of the graph of the equation
.
Let . In terms of ,
The graph of has as its vertical asymptote the line of the equation . The graph of is the result of three transformations on the graph of - a right shift of 3 units ( ), a vertical stretch ( ), and a downward shift of 2 units ( ). Of the three transformations, only the right shift affects the position of the vertical asymptote; the asymptote of also shifts right 3 units, to .
Example Question #4 : Transformations
Define
and
.
Which two transformations must be performed in the graph of in order to obtain the graph of ?
The graph of must be translated two units left, then reflected about the -axis.
The graph of must be translated two units right, then reflected about the -axis.
The graph of must be translated two units right, then reflected about the -axis.
None of the other choices gives the correct response.
The graph of must be translated two units left, then reflected about the -axis.
The graph of must be translated two units right, then reflected about the -axis.
, so the graph of is the result of performing the following transformations:
1) is the result of translating this graph two units right.
2) is the result of reflecting the new graph about the -axis.
Example Question #62 : Graphs
The graph of a function is reflected about the -axis, then translated upward units. Which of the following is represented by the resulting graph?
Reflecting the graph of a function about the -axis results in the graph of the function
.
Translating this graph upward results in the graph of the function
.
Example Question #63 : Graphs
Translate the graph of upward three units to yield the graph of a function . Which of the following is a valid way of stating the definition of ?
A vertical translation of the graph of a function by units yields the graph of the function . A translation in an upward direction is a positive translation, so setting and , the resulting graph becomes
or
Apply properties of logarithms to rewrite this as
.
Example Question #61 : Graphs
Reflect the graph of about the -axis to yield the graph of a function . Which of the following is a valid way of stating the definition of ?
None of the other choices gives the correct response.
The reflection of the graph of a function about the -axis yields the graph of the function . Therefore, set and substitute for to yield the function
.
Example Question #1 : Symmetry
Determine the symmetry of the following equation.
Symmetry along the y-axis.
Does not have symmetry.
Symmetry along the x-axis.
Symmetry along the origin.
Symmetry along all axes.
Does not have symmetry.
To check for symmetry, we are going to do three tests, which involve substitution. First one will be to check symmetry along the x-axis, replace .
This isn't equivilant to the first equation, so it's not symmetric along the x-axis.
Next is to substitute .
This is not the same, so it is not symmetric along the y-axis.
For the last test we will substitute , and
This isn't the same as the orginal equation, so it is not symmetric along the origin.
The answer is it is not symmetric along any axis.
Example Question #62 : Graphs
Which of the following is true of the relation graphed above?
It is a function, but it is neither even nor odd.
It is an odd function
It is not a function
It is an even function
It is an odd function
The relation graphed is a function, as it passes the vertical line test - no vertical line can pass through it more than once, as is demonstrated below:
Also, it can be seen to be symmetrical about the origin. Consequently, for each in the domain, - the function is odd.
Example Question #1 : Symmetry
Which of the following is true of the relation graphed above?
It is not a function
It is a function, but it is neither even nor odd.
It is an even function
It is an odd function
It is an odd function
The relation graphed is a function, as it passes the vertical line test - no vertical line can pass through it more than once, as is demonstrated below:
Also, it is seen to be symmetric about the origin. Consequently, for each in the domain, - the function is odd.
Example Question #1 : Symmetry
is an even function; .
True or false: It follows that .
True
False
False
A function is even if and only if, for all in its domain, . It follows that if , then
.
No restriction is placed on any other value as a result of this information, so the answer is false.
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