What describes how the data vary within a sample or set of samples

When only separate discreet points are graphed it is called?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?