Sometimes when one plots a set of data, it appears to be piecewise linear, causing one to ponder an explanation for the change in pattern at the corner(s).
Over the 9 year period, 1977 through 1985, the number of legal abortions (in thousands) performed in Bulgaria are given in the Table 12.
(a) Fit a piecewise linear graph to this data.
(b) Can you conclude anything?
