Question

(7c) describe trends in world population growth and distribution
each circle represents a city, red being the biggest
what does gray mean?
what percentage of humans live in rural areas according to map?
does this map indicate most humans live in rural or urban areas nowadays?

Explanation:

First question: "What does gray mean?"

In the context of a world population (city - related) map, gray areas are typically regions without cities (or with no significant urban population represented by the colored circles for cities). Since the circles represent cities, gray would be areas with rural populations (no city - sized settlements shown by the colored circles).

First, we need to find the percentage of the non - city (gray - related) population. Looking at the legend, the gray category (let's assume it's the "Non - urban" or "Rural - related" category) has a percentage. From the legend, if we sum the percentages of the city - related categories: \(21.9\%+7.1\% + 5.0\%+2.2\%+4.2\%+7.6\%=48\%\). Then, the rural percentage would be \(100\% - 48\% = 52\%\) (assuming the total is 100% and gray is the non - city part).

Step1: Sum city - related percentages

Sum the percentages of the colored (city - representing) categories: \(21.9 + 7.1+5.0 + 2.2+4.2+7.6=48\) (in percentage terms, so \(48\%\)).

Step2: Calculate rural percentage

Subtract the sum of city - related percentages from 100%: \(100\% - 48\%=52\%\).

Answer:

Gray likely represents areas with no cities (rural areas or areas without the city - sized populations represented by the colored circles).

Second question: "What percentage of humans live in rural areas according to map?"