Classroom worksheet titled "Picture Graphs" where students use a visual chart to answer questions about favorite pets.

Problem Analysis:

The image provided is a picture graph showing the favorite pets of students. The pets listed are Dog, Cat, and Rabbit. Each pet has a corresponding number of icons representing the number of students who chose that pet as their favorite.

#### Picture Graph Details:
- Dog: 5 icons
- Cat: 4 icons
- Rabbit: 2 icons

Questions to Solve:

1. How many students chose cat?
2. How many students chose dog?
3. Which pet is the most favorite?
4. Which pet is the least favorite?
5. How many more students chose dog than cat?

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Step-by-Step Solution:

#### Question 1: How many students chose cat?
- From the picture graph, there are 4 icons under the "Cat" row.
- Therefore, 4 students chose cat.

#### Question 2: How many students chose dog?
- From the picture graph, there are 5 icons under the "Dog" row.
- Therefore, 5 students chose dog.

#### Question 3: Which pet is the most favorite?
- Compare the number of icons for each pet:
- Dog: 5 icons
- Cat: 4 icons
- Rabbit: 2 icons
- The pet with the highest number of icons is Dog.
- Therefore, Dog is the most favorite pet.

#### Question 4: Which pet is the least favorite?
- Compare the number of icons for each pet:
- Dog: 5 icons
- Cat: 4 icons
- Rabbit: 2 icons
- The pet with the lowest number of icons is Rabbit.
- Therefore, Rabbit is the least favorite pet.

#### Question 5: How many more students chose dog than cat?
- Number of students who chose dog: 5
- Number of students who chose cat: 4
- Difference: \( 5 - 4 = 1 \)
- Therefore, 1 more student chose dog than cat.

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Final Answers:

1. 4 students chose cat.
2. 5 students chose dog.
3. The most favorite pet is Dog.
4. The least favorite pet is Rabbit.
5. 1 more student chose dog than cat.

Boxed Final Answers:

\[
\boxed{4, 5, \text{Dog}, \text{Rabbit}, 1}
\]