Practice Line Graph in Statistics
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A line graph is a chart that uses points connected by straight line segments to show how a quantity changes over time or across a continuous variable. The horizontal axis typically represents time, and the vertical axis represents the measured value.
Line graphs are like following a hiking trail on a map - they show the journey of a number over time. Going up means increasing, going down means decreasing. The steeper the line, the faster the change.
Example 1
easyThe table shows the temperature at noon each day for five days: Monday 12°C, Tuesday 14°C, Wednesday 11°C, Thursday 15°C, Friday 13°C. Describe how you would draw a line graph to display this data.
Example 2
mediumA shop recorded weekly sales (in units) over 6 weeks: 40, 55, 50, 65, 60, 75. From the line graph of this data, identify (a) the overall trend and (b) the week with the largest increase in sales.
Example 3
mediumA city recorded the average monthly rainfall (in mm) from January to June: 30, 25, 40, 55, 70, 85. Between which two consecutive months did rainfall increase the most?
Example 4
hardTwo towns recorded their noon temperatures (°C) over 4 days. Town A: 18, 22, 19, 25. Town B: 20, 21, 20, 21. Both are plotted on the same line graph. Which town shows greater variability and how can you tell from the graph?