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Let's go over each part of the problem visible in the image and work through the solutions.

### Question 1:
**Hasil prediksi 5 calon ketua OSIS yang dipilih oleh 40 siswa disajikan dalam diagram batang berikut.**

From the bar chart:
- **Andi:** 10 votes
- **Yudi:** 6 votes
- **Budi:** 15 votes
- **Irwan:** 7 votes
- **Santi:** 7 votes

From this chart:
1. **a.** The candidate with the most predicted votes is **Budi** (15 votes).
2. **b.** Candidates with the same predicted votes are **Irwan** and **Santi** (both with 7 votes).
3. **c.** The ratio between the highest and lowest predicted votes is \( \frac{15}{6} = 2.5 \).

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### Question 2:
**Sebuah perusahaan memiliki data perkembangan hasil produksi sebagai berikut:**

| Tahun  | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 |
|-------|------|------|------|------|------|------|
| Hasil Produksi | 124  | 155  | 142  | 234  | 100  | 145  |

From this table:
1. **a.** Display the data in a bar chart, plotting "Tahun" on the x-axis and "Hasil Produksi" on the y-axis.
2. **b.** The year with the greatest increase in production is between **2004 and 2005**, from 142 to 234 (an increase of 92 units).
3. **c.** The highest production occurred in **2005** (234 units).
4. **d.** The year with the sharpest decline in production is between **2005 and 2006**, from 234 to 100 (a decrease of 134 units).

---

### Question 3:
**Berikut ini merupakan diagram garis dari data penjualan dealer motor dari tahun 2000 sampai 2007.**

From the line chart, the sales data fluctuates over the years:
1. **a.** The year with the highest motorcycle sales is **2006**.
2. **b.** The year with the biggest drop in sales is between **2003 and 2004**.
3. **c.** The year with the largest increase in sales is between **2002 and 2003**.
4. **d.** The total number of motorcycles sold from 2000 to 2007 can be calculated by summing the values, which would require actual data from the chart.

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### Question 4:
**Hasil pengamatan suhu di suatu tempat selama 7 jam dapat dilihat pada tabel berikut:**

| Jam ke- | 1   | 2   | 3   | 4   | 5   | 6   | 7   |
|---------|-----|-----|-----|-----|-----|-----|-----|
| Suhu (°C) | 40  | 38  | 38  | 39  | 37  | 40  | 36  |

From this table:
1. **a.** The line chart for this data would have "Jam ke-" on the x-axis and "Suhu" on the y-axis, plotting each point according to the table values.
2. **b.** The lowest temperature is **36°C** at hour **7**.
3. **c.** The sharpest drop in temperature is between **hour 6 and hour 7** (from 40°C to 36°C).
4. **d.** The first significant change in temperature occurs between **hour 1 and hour 2** (a drop from 40°C to 38°C).

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Would you like a detailed explanation of any part, or have questions about a specific problem?

Here are 5 related questions to consider:
1. How do you calculate the percentage increase in production from year to year?
2. What type of graph is best suited for comparing changes over time, and why?
3. How would you estimate total sales from incomplete data in a chart?
4. What are the key differences between a bar chart and a line chart for representing data?
5. How would you calculate the average temperature over the 7-hour observation?

**Tip:** When analyzing data over time, identifying trends (increases or decreases) can help predict future values and spot unusual patterns.

Interpreting statistical data from bar charts, line graphs, and tables to answer questions about predicted OSIS chair votes, company production trends, motorcycle sales trends, and temperature changes.

Learn how to analyze bar charts, line graphs, and tables to interpret data. Solve problems about OSIS chairman votes, company production trends, motorcycle sales trends, and temperature changes. Suitable for Grades 7-9.

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