Directions: Complete each function table.
1. Rule: k = w + 20
Hint: In the first problem, w is the unknown and the rule is: k = w+20.
Substituting the given values you know that 40 = w+20. Solve this equation using the rules for solving equations:
40 = w + 20
(subtract 20 from each side) 20 = w, or w = 20
\LARGE \frac{40}{-20} = \LARGE \frac{w+20}{-20}
Knowing this information, you can use the rule:
IF k = w + 20, THEN k = 40, then w = 20. Substitute ‘20’ in the table.
1. Rule: k = w+20
Input
w
? (20)
?
42
?
?
86
output
k
40
58
?
64
44
?
2. Rule: e = 8 - m
Input
m
?
?
8
?
2
output
e
7
6
?
5
?
3. Rule: y = 64 - t
Input
t
4
?
10
?
?
15
output
y
?
56
?
27
31
?
4. Rule: h = 8c
Input
c
2
3
?
5
?
7
output
h
?
?
32
?
48
?
5. Rule: k = 2r
Input
r
?
?
?
9
12
?
14
output
k
12
14
16
?
?
22
?
6. Rule: k = 2r
Input
r
?
?
?
9
12
?
14
output
k
12
14
16
?
?
22
?
7. Rule: y = 98-w
Input
w
24
?
12
16
?
8
output
y
?
45
?
?
42
?
8. Rule: p = 5+d
Input
d
2
6
?
?
8
output
p
?
?
13
46
?
9. Rule: I = u+4
Input
u
6
?
3
?
output
l
?
9
?
5
10. Rule: w = 60-g
Input
g
?
?
5
?
12
?
output
w
5
10
?
8
?
20