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Math 12 LG 1 Practice Quiz #1



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Compared to the graph of the base function mc001-1.jpg, the graph of the function mc001-2.jpg is translated
A
9 units to the right
C
9 units down
B
9 units up
D
9 units to the left
 

 2. 

What is the equation of the transformed function, g(x), after the transformations are applied to the graph of the base function mc002-1.jpg, shown in blue, to obtain the graph of g(x), shown in red?
mc002-2.jpg
A
mc002-3.jpg
C
mc002-5.jpg
B
mc002-4.jpg
D
mc002-6.jpg
 

 3. 

When a function is reflected in the x-axis, the coordinates of point (x, y) become
A
(x, –y)
C
(–x, –y)
B
(–x, y)
D
(x, y)
 

 4. 

The function mc004-1.jpg represents a transformation that can best be described as
A
a reflection in the x-axis
C
a reflection in the y-axis
B
a reflection in the x-axis and the y-axis
D
a reflection in the line y = x
 

 5. 

When the value of a is less than –1, the function mc005-1.jpg has what relationship to the base function mc005-2.jpg?
A
f(x) is compressed vertically
B
f(x) is reflected and compressed vertically
C
f(x) is stretched vertically
D
f(x) is reflected and stretched vertically
 

Short Answer
 

 1. 

For each g(x), describe the transformation(s) from the base function sa001-1.jpg.
a) sa001-2.jpg
b) sa001-3.jpg
c) sa001-4.jpg
 

Problem
 

 1. 

The approximate height, h, in metres, of an object above the ground after it is dropped from a distance, d, in metres, can be modelled by the function pr001-1.jpg, where t is the time, in seconds, after being dropped.
a) Determine the function for an object being dropped from each height.
i) 400 m
ii) 550 m
iii) 850 m
b) Graph all three functions on the same set of axes.
c) Describe the transformation that relates the highest curve to the lowest curve.
d) Describe the transformation that relates the highest curve to the curve in the middle.
 

 2. 

For the base function pr002-1.jpg, a reflection in the y-axis is followed by a reflection in the x-axis.
a) Discuss the effect of each reflection on the base function.
b) Is there a point that you expect to be invariant during these reflections? If so, state its coordinates.
c) Graph the function after each reflection.
d) Use your graph in part c) to verify your answer for part b).
e) Make a general statement regarding invariant points after reflections in the x-axis and the y-axis.
 



 
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