2k - 4 = 2 + k
(Subtract both sides by k)
k - 4 = 2
(Add both sides by 4)
k = 6
The rate of change would be 7. you would plot your first point on the graph at (-2,0) and the next one would be up 7 and over 1 for your next plot point.
The equation of the line that passes through the points is y=3/5x+3
For this, all you'll wanna do is add the answer to this problem to your original number...
16× .75 = 12
now add...
16 + 12 = 28$ per pound...
to make a 75% profit on the markets investment....I think I'll have a salad instead at that price...
When using the Law of Sines the ambiguous case can result.
Source:
http://www.1728.org/trigtut2.htm
Scroll to the middle of the page.