Which task is performed by a geographic information system (GIS)?
1 answer:
Answer:
(B) Finding zip codes of areas with high population
Explanation:
A geographic information system (GIS) is designed to display data related to location.
You can express the location in different ways, such as address or ZIP code, and the system can include data like population density.
The diagram below shows the population density in the zip codes of a given county.
(A) is wrong. The concentration of atmospheric oxygen is about the same everywhere (but the amount of pollution isn't).
(C) is wrong. GIS is not of much use in recognizing the location of an accident, but it could be useful if you plotted the locations of many accidents over a period of time.
(C) is wrong. GIS is not of much use in examining the traffic over a single bridge, but it might be useful for comparing the traffic over many different bridges in an area.
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Answer:
Table B shows a proportional relationship
Explanation:
In a proportional relationship two quantities vary directly with each other.
So,
y ∝ x
y = kx
Where, k is the constant of variation.
The ordered pairs of table A are (-2,2), (-1,3), (0,0) and (1,5).
From these ordered pairs we can conclude that the value of y-coordinate is not changing according to the x-coordinate because the values of x increased by 1 for each ordered pair but the value of y is not increasing in the same proportion..
The ordered pairs of table B are (-1,-3), (0,0), (1,3) and (2,6). The value of y increasing at a constant rate 3 and the value of y-coordinate is 3 times of x-coordinate.
Choose any two ordered pairs of table B. Let the two points are (0,0) and (1,3).
The proportional relationship is defined as
y = 3x
Therefore, 3 is the constant of variation and rate of change.
So, Table B shows a proportional relationship.
