Identify Functions (Equations) Worksheet Template With Answer Key

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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.
2
yes
1) y × 6 = x
2) x × 9 = y
1.
no
2.
3
2
3) y
4) y
yes
= 2 - x
+ x = 3
3.
no
4.
7
5) y
6) x = 2 - y
yes
= 2 ÷ x
5.
yes
6.
-4
7) x = 8 + y
8) y
yes
= x + 4
7.
no
8.
-6
9) y = x ÷ 5
10) y
= x
yes
9.
no
10.
9
-4
11) y
12) y
= 2 + x
- 9 = x
yes
11.
no
12.
-6
13) y = x + 6
14) y
= x × 3
yes
13.
no
14.
3
5
-8
15) y
16) y
= x
= x - 6
yes
15.
no
16.
4
9
17) y - 2 = x
18) y
= x
yes
17.
no
18.
-4
19) y
20) y = -5
= x ÷ 8
no
19.
yes
20.
1-10 95 90 85 80 75 70 65 60 55 50
Math
3
11-20 45 40 35 30 25 20 15 10 5
0

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