Identify the constant of proportionality (k) for each graph and write the proportional relationship (y = kx). 14 points

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288