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The problem in the image shows Ravi building a fence, where each 2 feet of fencing costs $18. A table of lengths of fencing (in feet) and their corresponding costs (in dollars) is provided, but two values are missing in the length column, and one is missing in the cost column.

We can use the ratio $ \frac{18 \text{ dollars}}{2 \text{ feet}} = 9 \text{ dollars per foot} $ to calculate the missing values:

- For the missing length in the second row (with a cost of $45):  
  \[
  \frac{45}{9} = 5 \text{ feet}
  \]

- For the missing cost in the fourth row (with a length of 6 feet):  
  \[
  6 \times 9 = 54 \text{ dollars}
  \]

Thus, the missing values are:
- For the second row: Length = 5 feet.
- For the fourth row: Cost = $54.

The completed table looks like this:

\[
\begin{array}{|c|c|}
\hline
\text{Length of fencing (feet)} & \text{Cost (\$)} \\
\hline
2 & 18 \\
4 & 36 \\
5 & 45 \\
6 & 54 \\
8 & 81 \\
\hline
\end{array}
\]

Would you like more details or have any other questions?

### Related Questions:
1. What is the unit rate in dollars per foot?
2. How much would it cost to fence 10 feet of the garden?
3. How many feet of fencing can be bought for $72?
4. If the price per foot changes, how would you adjust the formula?
5. Can you express the relationship between cost and length as an equation?

**Tip:** Always double-check your units when working with rates, like dollars per foot, to avoid confusion!

Ravi is building a fence around his garden. For every 2 feet of fencing, the cost is $18. Complete the table below showing the length of the fence and the cost.

Discover how to calculate the cost of building a fence based on its length. Using the unit rate of $9 per foot, learn to fill out a table by determining missing lengths and costs. This problem is ideal for students in Grades 5 to 7, covering concepts like linear relationships and basic arithmetic operations.

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