Find the rule which gives the number of matchsticks required to make the following matchstick patterns. Use a variable to write the rule.
A pattern of letter T as `T`

Answer

To find the rule for the number of matchsticks required to make the letter "T" using matchsticks, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the number of matchsticks for one "T":**
- To create the letter "T", we need 2 matchsticks: one for the vertical line and one for the horizontal line.
- Therefore, for 1 "T", the number of matchsticks required is 2.

2. **Define a variable for the number of "T"s:**
- Let \( n \) represent the number of "T"s we want to make.

3. **Calculate the total number of matchsticks for \( n \) "T"s:**
- Since each "T" requires 2 matchsticks, if we want to make \( n \) "T"s, we multiply the number of "T"s by the number of matchsticks per "T".
- The formula becomes:
\[ \text{Total matchsticks} = 2 \times n \]

4. **Write the rule:**
- The rule that gives the number of matchsticks required to make \( n \) "T"s is:
\[ \text{Total matchsticks} = 2n \]