If it passes through zero, then that could be a first point (0, 0).
If you have the function of the curve, you can get other points by plugging in numbers for x and solving for y, giving you more coordinates in the form of (x, y). Suppose the curve is given in the parametric form as: x = f(t), y = g(t), a < t < b. Then giving different values of t and finding the corresponding values of x and y, we can get different points (x, y) on the curve.
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circle
In order to plot the points on either the frequency polygon or curve, the mid values of the class intervals of the distribution are calculated. Then the frequencies with respect to the mid points are plotted. However in a frequency curve the points are joined by a smooth curve, where as in a frequency polygon the points are joined by straight lines. Apart from this major difference, a frequency polygon is a closed figure where as the frequency curve is not.
This is the center, or locus, of a set of points, such as a curve or circle.
A continuous curve.
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