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Grade 8 Algebra: Identifying Functions
Name: ______________________
Date: ____________
Score: ____ / 8
Level 3
Equations
1.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
y
=
3
x
−
2
y = 3x - 2
y
=
3
x
−
2
2.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
x
=
4
x = 4
x
=
4
3.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
y
=
x
2
y = x^2
y
=
x
2
4.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
x
=
y
2
x = y^2
x
=
y
2
5.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
y
=
5
y = 5
y
=
5
6.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
x
2
+
y
2
=
25
x^2 + y^2 = 25
x
2
+
y
2
=
25
7.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
y
=
∣
x
∣
y = |x|
y
=
∣
x
∣
8.
Does the equation make
y
{y}
y
a function of
x
{x}
x
:
y
=
−
2
x
+
7
y = -2x + 7
y
=
−
2
x
+
7
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