first questions variables:

Code:

x| -5 |-4|-3|-2|-1| 0| 1| 2| 3
---------------------------------
y| 12 | 9| 4| 0|-1|-3| -5|-6|-8

i suspect i should take and write as

$\displaystyle \frac{4g(-5)+[g(2)]^{2}}{-2g(3)}$

$\displaystyle \frac{4(-3)(-5)+[-6(2)]^{2}}{-2(0)(3)}$

second question variables are:

$\displaystyle f(x) = -4x+3$

$\displaystyle k(x) = \sqrt[3]{x}$

so, $\displaystyle f[k(-8)]$ would be $\displaystyle f(x) = -4(-8)+3$ or is it $\displaystyle -4(\sqrt[3]{2})+3$

my college math book doesn't explain a bleeping thing how to do what. so if anyone knows of any literature, or preferably videos, on explicit functions and relationship problems wth problems like these that would be great... even domain and range.