10) The manager at a local Best Buy store kept track of daily sales of the...
10) The manager at a local Best Buy store kept track of daily sales of the iPhone 6 when it was first introduced. He noticed that sales were very high at first, but showed a steady decrease. For example, on day 5 after the phones first went on sale, the store sold 248 iPhone 6’s, but on day 10 after the phones first went on sale, the store sold only 163 iPhone 6’s. Assume that the relationship between number of days since the phone became available and number sold is linear and, let x = the number of days since the phone was released and y = number of phones sold at this Best Buy store.
a) Write two ordered pairs to represent the sales on the days described.
b) Find the slope of the line through those ordered pairs.
c) Write an equation in point-slope form of the line.
d) Convert the equation to slope-intercept form.
e) Explain what the slope and the y-intercept mean in the context of this problem.
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10) The manager at a local Best Buy store kept track of daily
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in
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and another
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in
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and then return to the
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level in
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Dollar Plus Store is a local discount store with the following
information:
OctoberOctober
sales are projected to be
$ 400 comma 000$400,000.
times•
Sales are projected to increase by
1010%
in
NovemberNovember
and another
2020%
in
DecemberDecember
and then return to the
OctoberOctober
level in
JanuaryJanuary.
times•
2525%
of sales are made in cash while the remaining
7575%
are paid by credit or debit cards. The credit card companies and
banks (debit card issuers) charge a
22%
transaction fee, and...
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