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