Use the image to answer the question.
An illustration shows a graph labeled Football Cost. The horizontal axis is labeled Quantity and ranges from 0 to 5 in increments of 1. The vertical axis is labeled Cost and ranges from 0 to 39 in increments of 3. An upward slanting line segment connects points plotted at left parenthesis 0 comma 0 right parenthesis, left parenthesis 1 comma 9 right parenthesis, left parenthesis 2 comma 18 right parenthesis, left parenthesis 3 comma 27 right parenthesis, and left parenthesis 4 comma 36 right parenthesis.
The price for footballs is displayed in the graph. Derive the equation of the proportional relationship through the origin.
(1 point)
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The equation for the proportional relationship through the origin is given by y = kx, where k is the constant of proportionality.
From the graph, we can see that when the quantity (x) is 1, the cost (y) is 9. We can use this information to find the constant of proportionality (k):
9 = k(1)
Therefore, k = 9.
So, the equation of the proportional relationship is:
y = 9x.
Which can be excluded from the list of environmental impacts of mining?(1 point)
Responses
sea level is rising
sea level is rising
water is polluted
water is polluted
habitats are destroyed
habitats are destroyed
harmful gases are released
Sea level is rising cannot be excluded from the list of environmental impacts of mining.
Which energy source releases the most carbon dioxide?(1 point)
Responses
coal
coal
solar
solar
hydroelectric
hydroelectric
wind
wind
Coal releases the most carbon dioxide among the given options.
What happens to infrared radiation released by the Earth if there is an increased level of carbon dioxide in the atmosphere?(1 point)
Responses
It escapes and cools the atmosphere.
It escapes and cools the atmosphere.
It is converted to carbon dioxide.
It is converted to carbon dioxide.
It is absorbed and heats the atmosphere.
It is absorbed and heats the atmosphere.
It is converted to solar energy.
If there is an increased level of carbon dioxide in the atmosphere, the infrared radiation released by the earth will be absorbed and heat the atmosphere.
With such huge increases in population, why has there not been a direct and equivalent increase in urban development (i.e., why is it such a small proportion of habitable land use)?(1 point)
Responses
Habitable land is already being used for livestock and crops.
Habitable land is already being used for livestock and crops.
There is not enough habitable land left for further urban development.
There is not enough habitable land left for further urban development.
Many people can live in small spaces, such as high rises in cities.
Many people can live in small spaces, such as high rises in cities.
People want to live close to where they work, which is usually the city or suburbs.
Many people can live in small spaces, such as high rises in cities.
Which human activity can result in the heat island effect?(1 point)
Responses
building green spaces and roof gardens
building green spaces and roof gardens
covering the ground with concrete and pavement
covering the ground with concrete and pavement
converting forest to agricultural land
converting forest to agricultural land
using habitable land for pasture land
using habitable land for pasture land