This deep dive covers Types of 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 4 of 10 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Types of Line Graphs
1. Simple Line Graph
Shows one variable changing over time (like the temperature example above).
2. Multiple Line Graph
Compares two or more variables on the same graph. Each line represents a different dataset.
3. Step Graph
Shows data that changes in distinct steps rather than smooth transitions. Useful for things like postage rates or tax brackets.
4. Smooth Curve
When data points suggest a smooth mathematical relationship, the line may be curved rather than straight between points.
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.