Gradual movement in time-series data over time is called

A) seasonal variation.
B) a cycle.
C) a trend.
D) exponential variation.
E) random variation.

Time-series Data

Data points collected or recorded at successive points in time, often used to analyze trends, cycles, or patterns.

Seasonal Variation

Periodic fluctuations in data or phenomena that occur at regular intervals within a year due to seasonal factors.