What cultural shift lead to the rise in popularity of Whole Foods?

The spike in the number of people who wanted to eat healthier.

Explanation:

Whole Foods is aimed at selling the most high-quality organic products. Organic is allegedly healthier than regular food (since they are required not to use chemicals to treat them), and this helped Whole Foods when the "eat healthier" fad came around in the US and other countries.

It must have the same slope as the given line, so

m = -A/B = -1/-2 = 1/2

So far, we have

y = mx + b = x/2 + b

Use the given point to find b.

4 = -2/2 + b = -1 + b

b = 5

y = x/2 + 5

Multiply through by 2.

2y = x + 10

Standard form:

x - 2y = -10