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Chapter 3 Review
Test Description: Review of Chapter 3 in 8th grade math.
Instructions: Answer all questions to get your test result.
1) How can you tell if a graph is proportional?
A
The graph is a straight line that goes through the origin.
B
The graph is a straight line.
C
The graph is not a straight line.
D
The graph goes through the origin.
2) How can you tell the initial value of a linear function from a table?
A
It is the value of y when x=0
B
It is the value of y when x=1
C
It is the first value of y in the table
D
It is the first value of x in the table
3) In a linear equation, y=mx + b, how can you tell the initial value of the function?
A
Find the value of x when y=1
B
Find the value of m
C
Find the value of y when x=1
D
Find the value of b
4) In a linear equation, y = mx + b, which variable is the rate of change?
A
b
B
x
C
m
D
y
5) In f(x)=3x - 2, find the output f(9).
A
25
B
11
C
31
D
15
6) In f(x) = x^2 + 3x -2, find the output f(-2).
A
-12
B
8
C
-4
D
10
7) Which function rule works for the point (1, 3)?
A
y=2x-3
B
y=2x +3
C
y=2x-1
D
y=2x+1
8) Which function rule works for the point (-2, 6)?
A
y= 2x +4
B
y= -4x +14
C
y = 2x -4
D
y=4x +14
9) How do you find the rate of change of a linear function in a table?
A
It is the value of x when y=0.
B
It is the change in y-values.
C
It is the value of y when x=0
D
It is the change in x-values.
10) The constant of proportionality is found in a graph by ...
A
Finding the value of y when x=1.
B
Finding the biggest point on the graph.
C
Finding the value of x when y=1.
D
Seeing if the graph goes through the origin
*select an answer for all questions
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