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Math 12 Pre-Calc LG 1 Practice Quiz #3



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. 

Given the graph of f(x) shown below, what are the coordinates of point A if the transformed graph is represented by mc002-1.jpg?
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. 

When b > 0, the function mc004-1.jpg has what relationship to the base function mc004-2.jpg?
A
f(x) is stretched vertically by a factor of |b| and reflected in the x-axis
B
f(x) is stretched vertically by a factor of |b|
C
f(x) is stretched horizontally by a factor of 1/|b| and reflected in the y-axis
D
f(x) is stretched horizontally by a factor of 1/|b|
 

 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. 

An object falls to the ground from a height of 25 m. The height, h, in metres, of the object above the ground can be modelled by the function pr002-1.jpg, where a is the acceleration due to gravity, in metres per second squared, and t is the time, in seconds.
a) Write an equation for the height of the object on Earth given a = 9.8 m/s2.
b) Write an equation for the height of the object on Mars given a = 3.7 m/s2.
c) Graph both functions on the same set of axes.
d) What scale factor can be applied to the Earth function to transform it to the Mars function?
 



 
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