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ad-work [718]
3 years ago
7

In 2011, a collector of sports memorabilia purchased specific baseball cards as an investment. Let y represent each card’s resal

e value (in dollars) and x represent the number of years since purchase. Each of the cards’ resale values after 0, 1, 2, 3, and 4 years could be modeled by linear functions as follows:
Card A: y=3−0.8x ,Card B: y=7+2.7x ,Card C: y=15+0.9x ,Card D: y=14−3.1x ,Card E: y=5+0.25x

Select ALL cards that are decreasing in value.

Question 3 options:

a)

Card E: y=5+0.25x

b)

Card D: y=14−3.1x

c)

Card B: y=7+2.7x

d)

Card C: y=15+0.9x

e)

Card A: y=3−0.8x
more than one answer.
Mathematics
1 answer:
Scrat [10]3 years ago
6 0
Y=mx+b
if m is negative then it is decreaseing


answer is cards A and D
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You can think of the percent symbol (%) and "per 100" (/100) as being interchangeable. 61% = 61/100

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