The graph of a linear equation 2x + 5y = 10 is a line, which meets the x-axis at the point

The linear equation 3x − 5y = 15 has

Which one of the following is NOT a graphical presentation of a frequency distribution?

Which one of the following is NOT a measure of dispersion?

For showing growth of population for the last 10 years, the best diagram is

The arithmetic mean of 100 observations is 50. If 10 is added to each observation then what will be the new arithmetic mean?