Line graph, Pie chart：練習問題

The line graph below shows the number of cars sold at a dealership over three months.
Car Sales:
January: 45 cars
February: 30 cars
March: 55 cars

How many fewer cars were sold in February than in January?

A pie chart shows the distribution of 120 books in a classroom library. There are 40 Fiction books, 30 Non-fiction books, and 20 Science books. The remaining books are Biographies. What is the central angle of the sector representing Biographies?

The line graph below shows the weight of a puppy recorded every Monday over six weeks. The weights are: Week 1 (\(2.4\text{ kg}\)), Week 2 (\(2.8\text{ kg}\)), Week 3 (\(3.5\text{ kg}\)), Week 4 (\(4.1\text{ kg}\)), Week 5 (\(4.8\text{ kg}\)), and Week 6 (\(5.4\text{ kg}\)). What was the average weekly weight gain from Week 1 to Week 6?

The line graph below shows the height of a plant recorded at the end of each week:
Week 1: \( 2 \text{ cm} \)
Week 2: \( 5 \text{ cm} \)
Week 3: \( 9 \text{ cm} \)
Week 4: \( 12 \text{ cm} \)
Between which two weeks did the plant grow the most?

A pie chart represents the distribution of 360 marbles in a box. The sectors are:
- Red marbles: Sector angle of \(120^\circ\)
- Blue marbles: Sector angle of \(90^\circ\)
- Yellow marbles: \(25\%\) of the total
- Green marbles: The remaining marbles
How many green marbles are in the box?

In a line graph showing the daily temperature over a week, what does the vertical axis (y-axis) usually represent?

A line graph shows the temperature recorded every 2 hours: 8am (\(16^\circ\text{C}\)), 10am (\(20^\circ\text{C}\)), 12pm (\(24^\circ\text{C}\)), 2pm (\(22^\circ\text{C}\)), and 4pm (\(18^\circ\text{C}\)). At what time was the temperature the highest, and what is the difference between the highest and lowest recorded temperatures?

A pie chart shows the distribution of 80 snacks in a box. If the sector for Chocolate has a central angle of \(45^\circ\), how many chocolate snacks are in the box?

The line graph tracks the population of a small town over five years:
2018: \(5000\) people
2019: \(5200\) people
2020: \(5600\) people
2021: \(6100\) people
2022: \(6800\) people

a) Calculate the total percentage increase in population from 2018 to 2022.
b) In which single year was the population growth (increase from the previous year) the highest?
c) If the growth from 2022 to 2023 is expected to be the same as the growth from 2021 to 2022, what will be the predicted population in 2023?

The line graph below shows the daily study hours of a student from Monday to Friday.
Monday: \(2\) hours
Tuesday: \(4\) hours
Wednesday: \(3\) hours
Thursday: \(5\) hours
Friday: \(1\) hour

a) What were the total study hours for the entire week?
b) Calculate the average (mean) study hours per day.
c) Find the difference between the most and least hours spent studying during the week.