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## Task: Representing Jessica’s Driving Distance 🚗 | |
Jessica is driving at a constant speed. She travels **90 miles in 2 hours**. | |
### Your Goal: | |
Represent the relationship between **time and distance** using different mathematical models: | |
✅ Bar Model | |
✅ Double Number Line | |
✅ Ratio Table | |
✅ Graph | |
Let’s go through each representation step by step! | |
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### Step 1: Identifying Current Representation | |
Which representations have you already used to show the relationship between time and distance? | |
- Bar Model | |
- Double Number Line | |
- Ratio Table | |
- Graph | |
If you haven’t used all of them, let’s go through each one step by step. | |
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### Step 2: Bar Model Representation 📊 | |
Have you created a **bar model** to represent Jessica’s travel? | |
**If not, follow these steps:** | |
1️⃣ Draw a **long bar** to represent **2 hours of driving**, labeling it **90 miles**. | |
2️⃣ Divide the bar into **two equal parts** to show **1 hour = 45 miles**. | |
3️⃣ Extend the bar to **3 hours** by adding another **45-mile segment**. | |
4️⃣ Divide **one 1-hour segment in half** to show **½ hour = 22.5 miles**. | |
✅ Does your bar model correctly show **½, 1, 2, and 3 hours**? | |
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### Step 3: Double Number Line Representation 📏 | |
Have you created a **double number line** for time and distance? | |
**If not, follow these steps:** | |
1️⃣ Draw **two parallel number lines**: | |
- The **top line** represents **time (hours)**. | |
- The **bottom line** represents **distance (miles)**. | |
2️⃣ Mark these key points: | |
- **0 hours → 0 miles** | |
- **½ hour → 22.5 miles** | |
- **1 hour → 45 miles** | |
- **2 hours → 90 miles** | |
- **3 hours → 135 miles** | |
3️⃣ Ensure the distances are evenly spaced. | |
✅ Does your number line show a **proportional relationship**? | |
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### Step 4: Ratio Table Representation 📋 | |
Have you created a **ratio table**? | |
**If not, follow these steps:** | |
1️⃣ Fill in the table below: | |
| Time (hours) | Distance (miles) | | |
|-------------|-----------------| | |
| 0.5 | 22.5 | | |
| 1 | 45 | | |
| 2 | 90 | | |
| 3 | 135 | | |
2️⃣ Look for patterns. | |
3️⃣ What would be the distance for **4 hours**? | |
✅ Does your table clearly show a **proportional pattern**? | |
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### Step 5: Graph Representation 📈 | |
Have you created a **graph** to represent this relationship? | |
**If not, follow these steps:** | |
1️⃣ Draw a **coordinate plane**: | |
- **x-axis → time (hours)** | |
- **y-axis → distance (miles)** | |
2️⃣ Plot these points: | |
- (0, 0) | |
- (0.5, 22.5) | |
- (1, 45) | |
- (2, 90) | |
- (3, 135) | |
3️⃣ Draw a straight line through these points. | |
4️⃣ What does the **slope of the line** tell you about Jessica’s driving rate? | |
✅ Does your graph correctly show a **linear relationship**? | |
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### Step 6: Final Reflection 💭 | |
Great job! Now, take a moment to reflect: | |
1️⃣ Which representation helped you understand the relationship best? Why? | |
2️⃣ How do these representations show the **same proportional relationship** in different ways? | |
3️⃣ Can you apply this method to another real-world proportional relationship? | |
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### New Challenge 🌟 | |
Imagine Jessica **increases her speed** by **10 miles per hour**. | |
- How would this affect the bar model, number line, ratio table, and graph? | |
- Try adjusting your models to reflect this change! | |
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### Summary of Objectives 🎯 | |
- You explored **four ways** to represent proportional relationships: **Bar Model, Double Number Line, Ratio Table, and Graph**. | |
- You understood how **time and distance** relate at a **constant rate**. | |
- You analyzed how different models show the **same mathematical pattern**. | |
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### Common Core Math Standards 🏆 | |
- **6.RP.A.1** - Understand the concept of a ratio. | |
- **6.RP.A.3a** - Use ratio reasoning to solve real-world problems. | |
- **7.RP.A.2** - Recognize proportional relationships. | |
✅ **Congratulations! You’ve completed this module.** 🚀 |