An individual's income rises from $77 comma 00077,000 per year to $83 comma 00083,000 per year, and as a consequence the person's purchases of movie downloads rise from 22 per month to 55 per month. this individual's income elasticity of demand is
therefore, movie downloads are goods.

1) 19.23/Positive

2) Normal

Explanation:

In order to calculate the income elasticity of a product we will have to measure the percentage change in income and the percentage change in  quantity purchased of that product cause by the change of income.

Percentage change income = (83,000-77,000)/77,000= 7.8%

Income increased by 7.8%.

Percentage change in purchase of movie downloads= (55-22)/22= 150%

So a 7.8% increase in income increases the purchases by 150%, in order to calculate the income elasticity we will divide 150 by 7.8

150/7.8=19.23

Income elasticity = 19.23

Because the income elasticity is positive we can infer that movie downloads are normal goods because the quantity purchased increases when income increases.

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.