Worksheet - Math 8 Final Exam Practice #2
Name _____________________________ Period ____
(First and Last)
Instructions: Pencils only. Show work whenever it can be shown (spiral N/B o.k.). No guessing!
18a.
Consider the linear function y = 4x + 7 and a
second linear function with a slope of 7 and a yintercept of 4. Which of these statements are
correct? Select all that apply.
A
The function y = 4x + 7 has the smaller rate of
change.
B
The function with a slope of 7 and a y-intercept
of 4 has the smaller rate of change.
C
The two functions have the same rate of change.
D
The function y = 4x + 7 has the smaller yintercept.
E
The function with a slope of 7 and a y-intercept
of 4 has the smaller y-intercept.
F
The two functions have the same y-intercept.
12.
Which of these tables of values represents a linear
function that has a smaller rate of change than the
linear function y = 6x – 2 ?
A
x y
C
x y
E x y
2
10
1
22
3
11
4
26
3
30
4
18
6
42
5
38
5
25
8
58
7
46
6
32
B
x y
D
x y
F x y
3
28
5
26
5
26
6
34
7
38
6
31
9
40
9
50
7
36
11 62
8
41
12 46
18b.
Consider the linear function y = 8x + 1 and a
second linear function with a slope of 1 and a yintercept of 8. Which of these statements are
correct? Select all that apply.
A
The two functions have the same y-intercept.
B
The function with a slope of 1 and a y-intercept
of 8 has the greater y-intercept.
C
The function y = 8x + 1 has the greater yintercept.
D
The two functions have the same rate of change.
E
The function with a slope of 1 and a y-intercept
of 8 has the greater rate of change.
F
The function y = 8x + 1 has the greater rate of
change.
13.
Select all statements that are correct about the
relation y = 23 x + 43 .
A
It is in the form y = mx + b.
B
It is a function.
C
Its graph is a straight line.
9a.
This is a graph of a linear function. Which
equation is represented by this graph?
A
y = 43 x − 1
B
y = 43 x + 1
C
y = 43 x + 1
D
y = 43 x − 1
9b.
What is the equation of the line in this graph?
9c.
This is a graph of a linear function. Which
equation is represented by this graph?
25.
Which of these statements correctly describes
the function y = 12x − 2 ?
A
y = −2x + 2
A
It is not a linear function and its graph is
not a straight line.
B
y = − 12 x − 1
B
It is not a linear function but its graph is
a straight line.
C
y = −2x − 1
C
It is a linear function but its graph is not
a straight line.
D
y = − 12 x + 2
D
It is a linear function and its graph is a
straight line.
23.
Noah believes that the function y = −8x is
linear while Marco believes that it is not
linear. Who is right, and why?
A
Marco is right because the function
cannot be written in the form y = mx + b.
B
Marco is right because the function
can be written in the form y = mx + b,
with b = 0.
C
Noah is right because the function
cannot be written in the form y = mx + b.
D
Noah is right because the function can
be written in the form y = mx + b,
with b = 0.
15.
Select all the linear functions.
A
y = 12
B
y = 7x
C
y = x2 − 5
30.
Jamie believes that the function y = −12 is
linear while Jillian believes that it is not linear.
Who is right, and why?
A
Jillian is right because the function
can be written in the form y = mx + b,
with m = 0.
B
Jillian is right because the function
cannot be written in the form y = mx + b.
C
Jamie is right because the function
can be written in the form y = mx + b,
with m = 0.
D
y = x2 − 4
2
E
y = x2 − 5
F
y = 3x 4
D
Jamie is right because the function
cannot be written in the form y = mx + b.
18a. AE
12. BCF
9c. B
25. D
18b. BF
9a. D
23. D
15. ABC
3
9b. y = 2 x − 2
30. C
13. ABC