All HiSET: Math Resources
Example Questions
Example Question #1 : Understand Transformations In The Plane
The graph on the left shows an object in the Cartesian plane. A transformation is performed on it, resulting in the graph on the right.
Which of the following transformations best fits the graphs?
Dilation
Reflection in the x-axis
Translation
Rotation about the origin
Reflection in the y-axis
Translation
A dilation is the stretching or shrinking of a figure.
A rotation is the turning of a a figure about a point.
A reflection is the flipping of a figure across a line.
A translation is is the sliding of a figure in a direction.
With a translation, the image is not only congruent to its original size and shape, but its orientation remains the same. A translation fits this figure best because the shape seems to move upward and rightward without changing size, shape, or orientation.
Example Question #2 : Translations
Translate the graph of the equation
left four units and down six units. Give the equation of the image.
If the graph of an equation is translated to the right units, and upward
units, the equation of the image can be found by replacing
with
and
with
in the equation of the original graph.
Since we are moving the graph of the equation
left four units and down six units, we set and
; we can replace
with
, or
, and
with
, or
. The equation of the image can be written as
Simplify by distributing:
Collect like terms:
Add 26 to both sides:
,
the correct choice.
Example Question #6 : Understand Transformations In The Plane
Translate the graph of the equation
right two units and up five units. Give the equation of the image.
None of the other choices gives the correct response.
If the graph of an equation is translated to the right units, and upward
units, the equation of the image can be found by replacing
with
and
with
in the equation of the original graph.
Since we are moving the graph of the equation
right two units and up five units, we set and
; we can therefore replace
with
and
with
. The equation of the image can be written as
This can be rewritten by applying the binomial square pattern as follows:
Collect like terms; the equation becomes
Subtract 100 from both sides:
Example Question #102 : Hi Set: High School Equivalency Test: Math
Translate the graph of the equation
right four units and down two units. Give the equation of the image.
If the graph of an equation is translated to the right units, and upward
units, the equation of the image can be found by replacing
with
and
with
in the equation of the original graph.
Since we are moving the graph of the equation
right four units and down two units, we set and
; we can therefore replace
with
, and
with
, or
. The equation of the image can be written as
The expression at right can be simplified. First, use the distributive property on the middle expression:
Now, simplify the first expression by using the binomial square pattern:
Collect like terms on the right:
Subtract 2 from both sides:
,
the equation of the image.
Example Question #103 : Hi Set: High School Equivalency Test: Math
Translate the graph of the equation
left three units and down five units. Give the equation of the image.
None of the other choices gives the correct response.
If the graph of an equation is translated to the right units, and upward
units, the equation of the image can be found by replacing
with
and
with
in the equation of the original graph.
Since we are moving the graph of the equation
left three units and down five units, we set and
; we can therefore replace
with
, or
, and
with
, or
. The equation of the image can be written as
We can simplify the expression on the right by distributing:
Collect like terms:
Subtract 5 from both sides:
,
the correct equation of the image.
Example Question #104 : Hi Set: High School Equivalency Test: Math
On the coordinate plane, let and
be located at
and
, respectively. Let
be the midpoint of
and let
be the midpoint of
. On the segment, perform the translation
. Where is the image of
located?
The midpoint of a segment with endpoints at and
is located at
Substitute the coordinates of and
in this formula to find that midpoint
of
is located at
, or
.
Substitute the coordinates of and
to find that midpoint
of
is located at
, or
.
To perform the translation , or, equivalently,
,
on a point, it is necessary to add
to its -coordinate, and
to its -coordinate.
Therefore, the -coordinate of the image of
under this translation is
;
its -coordinate is
The image of is located at
.
Example Question #2 : Translations
Consider regular Hexagon .
On this hexagon, perform the translation . Then reflect the hexagon about
. Let
be the image of
under these transformations, and so forth.
Which point on Hexagon is the image of
under these transformations?
The translation on a figure is the translation that shifts a figure so that the image of
, which we will call
, coincides with
. All other points shift the same distance in the same direction. Below shows the image of the given hexagon under this translation, with the image of
marked as
:
If the image is reflected about , the new image is the original hexagon. Calling
the image of
under this reflection, we get the following:
, the image of
under these two transformations, coincides with
.
Example Question #51 : Measurement And Geometry
Consider regular Hexagon .
On this hexagon, perform the translation . Then perform a
rotation on the image with center at
. Let
be the image of
under these transformations, and so forth.
Which of the following correctly shows Hexagon relative to Hexagon
?
The translation on a figure is the translation that shifts a figure so that the image of
, which we will call
, coincides with
. All other points shift the same distance in the same direction. Below shows the image of the given hexagon under this translation:
If this new hexagon is rotated clockwise - one third of a turn - about
, and call
the image of
, and so forth, the result is as follows:
Removing the intermediate markings, we see that the correct response is
Example Question #111 : Hi Set: High School Equivalency Test: Math
Consider regular Hexagon .
On this hexagon, perform the translation . Then perform a
rotation on the image with center at
.
Let be the image of
under these transformations,
be the image of
, and so forth. Under these images, which point on the original hexagon does
fall?
The translation on a figure is the translation that shifts a figure so that the image of
coincides with
. All other points shift the same distance in the same direction. Below shows the image of the given hexagon under this translation, with
the image of
:
If this new hexagon is rotated - one half of a turn - about
- the image is the original hexagon, but the vertices can be relabeled. Letting
be the image of
under this rotation, and so forth:
coincides with
in the original hexagon, making
the correct response.
Example Question #2 : Translations
On the coordinate plane, let ,
, and
be located at the origin,
, and
. Construct the median of
from
and let the foot of the median be
. On the triangle, perform the translation
. Where is the image of
?
By definition, a median of a triangle has as its endpoints one vertex and the midpoint of the opposite side. Therefore, the endpoints of the median from are
itself, which is at
, and
, which itself is the midpoint of the side with origin
and
, which is
, as its endpoints.
The midpoint of a segment with endpoints at and
is located at
,
so, substituting the coordinates of and
in the formula, we see that
is
, or
.
See the figure below:
To perform the translation , or, equivalently,
,
on a point, it is necessary to add
and
to the - and
- coordinates, respectively. Therefore, the image of
is located at
,
or
.
All HiSET: Math Resources
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