Question 389678
The slope m is {{{m = DELTA(y)/DELTA(x)}}} (change in y over change in x). Substituting the numbers in,


{{{m = (2.31 - 1.26)/(2006 - 1997) = 1.05/9 = 7/60}}}


By the way, I have changed the topic of this question from "linear algebra" to "linear equations, graphs, slope." Linear algebra is a fairly abstract subject in mathematics :)