Can a frequency polygon give an idea of frequency of observations at a particular point?

Collision frequency (Z) of a gas at a particular pressure

Histogram represents frequency over a class interval. Can it represent the frequency at a particular point value?

Histogram represents frequency over a class interval. Can it represent the frequency at a particular point value ?

A plane electromagentic wave of frequency 25 MHz travels in free space along the x-direction. At a particular point in space and time , E=6.3 hatj V/m . What is B at the point ?

Construct the frequency polygons of the following frequency distributions. Sale of tickets for drama in an auditorium.

Ages of 60 teachers in primary schools of a Mandal are given in the following frequency distribution table. Construct the Frequency polygon and frequency curve for the data without using the histogram. (Use separate graph sheets)