The parametric equations specify the position of a moving point P ( x, y ) at time t. Sketch the graph. 
Definitions:
Total Number
The aggregate count or sum of all units or elements within a specified set or collection.
Data Set
A collection of related data points or values that have been gathered to be analyzed or used as a basis for decision-making.
Cumulative Relative Frequency
A calculation used in statistics to summarize data by accumulating percentages of observations in ascending order.
Proportion
A part or fraction of a whole, often expressed as a percentage or decimal.
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