Mathematics for IGCSE & O level - Statistical Diagrams (Section 5 - No. 29)
What does a straight, sloping line in a cumulative frequency diagram indicate about the data distribution?
Data is evenly distributed in that interval.
There are many outliers.
The data is clustered.
There is no data in the interval.
Explication
A straight line means a consistent rate of change in the cumulative frequency, indicating even distribution within that interval.