Reteach and Skills Practice Workbook

12–5
Name
Skills Practice
Date
4AF1.5
Functions
Complete each function table.
1. Roger runs 7 miles more each week
than another boy.
Rule: y = x + 7
3. One number is 8 greater than 2 times
another number.
Rule: n = 2m + 8
Input (x)
Output (y)
Input (m)
Output (n)
1
8
1
10
2
9
2
12
3
3
4
4
5
5
2. One number is 4 less than 3 times
another number.
Rule: d = 3c - 4
4. Liz swims 2 more than 2 times as
many laps as Sunny does.
Rule: a = 2b + 2
Solve.
Input (c)
4
5
6
7
8
Output (d )
8
11
Input (b)
0
1
2
3
4
Output (a)
5. Each of 4 people orders an $8 lunch. How much do the 4 lunches cost? Write and
solve an equation.
6. Ben buys 3 toys that cost $3 each. How much do the toys cost? Write and solve an
equation.
2
4
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Grade 4 224 Chapter 12