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