1. Translating between Tables and Expressions#6

2. Example 1: Writing an Expression
Write an expression for the missing value in the table.
Spike’s Age
Rusty’s Age 2 6 3 7 4 8 a

3. Write an expression for the missing value in each table.
Example 2
Write an expression for the missing value in each table.
Side length (cm) 23 63 9 12 x
Perimeter (cm) 24 36 48

4. Write an expression for the sequence in the table.
Example 3
Write an expression for the sequence in the table.
Position
2 1 2 3 4 n
Value 7 9 11 13 ?

5. Write an expression for the sequence in the table.
Example 4
Write an expression for the sequence in the table.
Position 21 2 3 4 n
Value 6 7 8 9 ?

6. Example 5: Writing an Expression for the Area of a Figure
A triangle has a base of 6 inches. The table shows the area of the triangle for different heights. Write an expression that can be used to find the area of the triangle when its height is h inches.
Base (in.)
Height (in.)
Area (in2) 6 1 3 2 4 12 h

7. Example 6
Suppose the entries in the base column and the height column of the table are reversed. Would your expression for the area of the triangle change? Explain.