- Purpose: Show how data changes over time or continuous variables
- Time axis: Usually horizontal (x-axis) shows time periods
- Value axis: Vertical (y-axis) shows the measured values
- Data points: Plotted at exact coordinates and connected with lines
- Trends: Shows increasing, decreasing, or constant patterns
- Continuous data: Best for data that can have any value between points
- Multiple series: Can show several datasets on one graph
This key facts covers Key Facts About Line Graphs within Line Graphs for GCSE Mathematics. Revise Line Graphs in Statistics for GCSE Mathematics with 10 exam-style questions and 20 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 10 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Line Graphs
A time series graph is used to show:
A time series graph shows house prices from 2015 to 2023. A student extends the line to predict the house price in 2030. Explain why this prediction might be unreliable.
Quick recall flashcards
When should you use a line graph?
Use line graphs to:
ā¢ Show changes over time
ā¢ Display continuous data
ā¢ Show trends and patterns
ā¢ Compare multiple datasets
ā¢ Enable interpolation and extrapolation
What is a line graph?
A line graph is a type of chart that displays data as points connected by straight lines. It's used to show how data changes over time or across a continuous variable.