Identify Functions (Equations) Worksheet Template With Answer Key Page 13

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

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