28. a) use a ruler to make a number line between 0 and 1 that includes all the
tenths (1.e., from 0.1 up to 0.9), and includes 0.25, 0.5, and 0.75. (you may
want to start by making a mark on your number line at every inch from 0 to
10. the first mark would be zero and the last would be 1, and the numbers
in between would be the tenths.) b) do the same thing to make a
number line between 2 and 3 and include the tenths from 2.1 to 2.9, as well
as 2.25, 2.5, and 2.75.

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so, about which interval is it approximately symmetric?