Reading Line Graphs

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Show your work for each problem.

1.
Which axis on a line graph usually shows time?
1. a)Title
2. b)Y-axis (vertical)
3. c)X-axis (horizontal)
4. d)Z-axis
2.
If a line on a graph goes upward from left to right, what does it show?
1. a)The values stay the same
2. b)The values are increasing
3. c)There is no data
4. d)The values are decreasing
3.
A line graph shows temperatures: Monday 12°C, Tuesday 15°C, Wednesday 18°C. What is the temperature on Tuesday?
4.
A line graph shows website visitors: Day 1: 200, Day 2: 250, Day 3: 300. How many more visitors were there on Day 3 than Day 1?
5.
What does a flat (horizontal) line on a graph indicate?
1. a)No change in value
2. b)Rapid decrease
3. c)Missing data
4. d)Rapid increase
6.
A line graph shows daily book sales: Monday 40, Tuesday 55, Wednesday 35, Thursday 60, Friday 50. Find the highest and lowest sales days and calculate the range.
7.
A line graph shows temperature changes: 8 AM: 14°C, 10 AM: 18°C, 12 PM: 22°C, 2 PM: 24°C. Describe the trend and calculate the total change.
8.
A line graph shows plant height over weeks: Week 1: 5 cm, Week 2: 8 cm, Week 3: 11 cm, Week 4: 14 cm. By how many centimeters does the plant grow each week?
9.
A line graph shows test scores over 4 weeks: 65, 70, 68, 75. Between which two weeks did the score decrease?
1. a)Week 1 to Week 2
2. b)No decrease occurred
3. c)Week 3 to Week 4
4. d)Week 2 to Week 3
10.
A line graph shows rainfall in mm: Mon 4, Tue 8, Wed 6, Thu 10, Fri 2. What is the average daily rainfall?
11.
A line graph shows ice cream sales: June 120, July 180, August 200, September 150. In which month were sales highest? Calculate how much more was sold in the peak month compared to June.
12.
A line graph shows two students' reading pages per day. Student A: Mon 15, Tue 20, Wed 25, Thu 30. Student B: Mon 25, Tue 25, Wed 25, Thu 25. Compare their trends and find who read more pages total.
13.
A line graph shows a steep rise followed by a gradual decline. Which real-world situation could this represent?
1. a)Temperature rising in morning then cooling in evening
2. b)Age increasing over years
3. c)Constant heart rate during rest
4. d)A plant growing steadily taller
14.
A line graph shows scores: Game 1: 85, Game 2: 92, Game 3: 78, Game 4: 95, Game 5: 88. If the pattern of the last 3 games (down, up, down) continues, predict Game 6's approximate score.
15.
A line graph shows pool water temperature every 2 hours: 6AM: 20°C, 8AM: 22°C, 10AM: 26°C, 12PM: 30°C, 2PM: 32°C, 4PM: 30°C. When was the temperature rising fastest? Calculate that rate of change.