Identify Functions (Equations) Worksheet Template With Answer Key
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20Identify 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.
3
-6
yes
1) y
2) y
= 2 ÷ x
= 6x
1.
no
2.
6
3) x × 6 = y
4) 8y = x
no
3.
yes
4.
4
4
5) x ÷ 5 = y
6) x + 5 = y
no
5.
no
6.
8
6
7) y
8) y
no
= 2 × x
= 2 ÷ x
7.
no
8.
9) y = x + 7
10) y = 7 + x
yes
9.
yes
10.
6
-8
11) y
12) y
+ x = 6
= x - 3
no
11.
no
12.
1
13) y = x × 2
14) y
= 2 × x
yes
13.
yes
14.
1
15) y = 6
16) y
= 2 - x
yes
15.
yes
16.
3
17) y
18) 5y = 2x
= 2 + x
yes
17.
yes
18.
-2
-8
19) y
20) y
× 2 = x
= x + 4
no
19.
no
20.
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