by counting the amount of numbers and puting them in a tally.
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you get a range and put all the numbers in their correct range and those together
week frequency cumulative frequency123
Given a frequency table,the first cumulative frequency is the same as the first frequency;the second cumulative frequency is the sum of the first cumulative frequency and the second [ordinary] frequency;the third cumulative frequency is the sum of the second cumulative frequency and the third [ordinary] frequency;and so on.An alternative definition is that the cumulative frequency for any value is the sum of all the frequencies less than or equal to that value.
No. Adding negative numbers will make them more negative.
Pretend both the numbers are positive, find the quotient as normal and then make it negative.