Identify Functions (Equations) Worksheet Template With Answer Key Page 16
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20Answer Key
Identify Functions (Equations)
Name:
Determine if each equation describes a function (yes) or not (no). In the eqation x
A n s w e r s
represents the input and y represents the output.
1
yes
1) y
2) x = 8 ÷ y
= 2 × x
1.
yes
2.
-4
-8
3) y
4) y
no
= x ÷ 6
× 3 = x
3.
no
4.
5
5) y = x
6) y - 4 = x
yes
5.
yes
6.
2
8
7) y = x - 4
8) y
yes
= x
7.
no
8.
-8
9) y
10) x = -3
= x × 4
no
9.
no
10.
4
11) y ÷ 9 = x
12) y
= 2 ÷ x
yes
11.
no
12.
6
13) x ÷ 6 = y
14) 4y = 3x
no
13.
yes
14.
7
15) y = x × 6
16) y
= 2 - x
yes
15.
yes
16.
-2
1
17) y
18) y
= x + 3
= 2 ÷ x
no
17.
yes
18.
4
19) y
20) x = 5 × y
= 2 - x
no
19.
yes
20.
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