Let P(t) be the percentage of Americans under the age of 18 at time t. The table gives values of this function in census years from 1950 to 2000. (I didn't put the table here because it will not display well so the table has basically t as time from 1950 to 2000 and P(t) values. I found P'(t) and it asks me these questions and I have no idea about what they are asking for)
--- How would it be possible to get more accurate values for P'(t). Note the US census is only taken every 10 years so we cannot get more data point.
----what kinds of things could result in a more accurate tangent line