8th Grade Math Quiz
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FUNCTIONS
Question 1
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Which comparison is correct?
A
y
=
2
x
y=2x
y
=
2
x
and
y
=
x
2
y=x^2
y
=
x
2
are both linear because both graphs pass through
(
0
,
0
)
(0,0)
(
0
,
0
)
.
B
y
=
2
x
y=2x
y
=
2
x
is non-linear because it has a variable;
y
=
x
2
y=x^2
y
=
x
2
is linear because it has an
x
x
x
.
C
y
=
2
x
y=2x
y
=
2
x
is linear because
x
x
x
is to the first power;
y
=
x
2
y=x^2
y
=
x
2
is non-linear because
x
x
x
is squared.
D
y
=
2
x
y=2x
y
=
2
x
is non-linear because it has no
b
b
b
term;
y
=
x
2
y=x^2
y
=
x
2
is linear because it has a constant rate of change.
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