An individual derives utility from consuming "all other goods," g, and clean air (measured by the reduction in particulate matter per m3), a, as measured by the utility function U(g,a) = g0.6a0.4. The price of consumer goods equals $20 and the price of clean air (abatement) equals $10. What is the slope of the Engel curve when income increases from $100 to $200?
A) The slope is 25.
B) The slope is -25.
C) The slope is zero.
D) The slope is infinite.
A
Economics
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