Reteach and Skills Practice Workbook

12–5
Name
Reteach
Date
4AF1.5
Functions
The numbers in a function table relate to one another to
form a pattern.
One number is 1 greater than 2 times a number.
Chapter Resources
x 1 2 3 4 5
y 3 5 7 9 11
Think: How can I find the value of y?
x = 1 2 3 4 5
↓ ↓ ↓ ↓ ↓
Equation = 2x + 1 2x + 1 2x + 1 2x + 1 2x + 1
↓ ↓ ↓ ↓ ↓
y = 3 5 7 9 11
In each case, multiply by 2 and add 1.
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Complete each function table. Then write an equation.
1. One number is 2 greater than another
number.
Think: Add 2 to x to get y.
x 1 2 3 4 5
y 3 4
2. One number is 4 times another
number.
Think: Multiply x by 4 to get y.
x 1 2 3 4 5
3. One number is 5 less than another
number.
Think: Subtract 5 from x to get y.
x 10 9 8 7 6
y 5
4. One number is 1 less than 2 times a
number.
Think: Multiply x by 2 and subtract 1
x 1 2 3 4 5
y 4 8
y 1
Grade 4 223 Chapter 12