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KJ4UTS
 one year ago
Write a function to describe each investment of $1000:
stock increasing in value 19% per year
stock decreasing in value 9% each year
If the time is needed to write the function it is 3 years.
Stock increasing
$1000 * 1.19 ^ 3 = $1685.159
Stock decreasing
$1000 * 0.91 ^ 3 = $753.571
You can replace 3 by n for number of years in both cases
Did I do the math right for this, particularly the decimals?
Would this problem be considered a function?
KJ4UTS
 one year ago
Write a function to describe each investment of $1000: stock increasing in value 19% per year stock decreasing in value 9% each year If the time is needed to write the function it is 3 years. Stock increasing $1000 * 1.19 ^ 3 = $1685.159 Stock decreasing $1000 * 0.91 ^ 3 = $753.571 You can replace 3 by n for number of years in both cases Did I do the math right for this, particularly the decimals? Would this problem be considered a function?

This Question is Closed

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0The question that I have is to think of a function that you encounter in your everyday life. Carefully describe the inputs and corresponding outputs. Give your function a name and illustrate how you would use functional notation with your function. Describe the domain and range of your function. I think the domain or input would be the initial investment and the range or output would be the profit or loss.

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1increase add decrease subtract compound interest in both cases a = P(1 +r/n)^nt 1000*1.19^n 1000*0.91^n agree

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0So would this example also be a function if you buy 100 shares at $20 each and sell them at $22 each, your profit is $200 [100 x ($22  $20) = 100 x $2] minus commission costs of $19.90, or $181.10.

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0I am confused with the 1.19 and the 0.91 would 19% be 0.19 and 9% 0.09 as a decimal?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440960836670:dw

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440961060228:dw

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0Oh ok so both of these examples are considered functions because they have an input and output. I think compound interest is an exponential function. What would function notation be for these problems?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1function only one output for a particular input

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1compound interest yes exponential function y varies as power of x

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0and my second example also applies?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1function notation domain set of input values x: x > or = 1000 range set output values min <y< max

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1buying shares example you need to state the commission cost net profit = revenue  expenses profit = (sales  cost )*no of shares  fixed expense the commission remember y = m*x + b

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1review any set (x, y) is a relation but when only 1 y for a given x then you have a function

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0@triciaal thank you for your time and help I am just still not 100% clear if these examples are functions to me I think they have 1 y for a given x?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1yes functions only 1 y for any given x

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0If you don't mind what do you think of this example I came up with Say I have an initial investment of $2,000 and I buy Jet Blue (JBLU) stock for $22.30 per share. $2,000/$22.30=89.69 or 89 shares The stock then goes up to a price of $24.64. 89 (shares) * $24.64 (share price) = $2,192.96 (total value) $2.192.96  $2,000 = $192.96 (Profit)

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1the interest received varies as the length of time for the investment the amount accumulated depends on the time invested

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0Ok I think I understand it better.

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1I think you need to define what you are doing then apply the example

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0Doing as far as a goal?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1If you don't mind what do you think of this example I came up with Say I have an initial investment of $2,000 and I buy Jet Blue (JBLU) stock for $22.30 per share. $2,000/$22.30=89.69 or 89 shares The stock then goes up to a price of $24.64. 89 (shares) * $24.64 (share price) = $2,192.96 (total value) $2.192.96  $2,000 = $192.96 (Profit)

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1with this a) if I have $2000 to invest in jet blue share that cost 22.30 per share how many share will I be able to purchase ? 2000 = 22.30 * x no of shares = investment / cost per share b)I own 89 shares of jet blue stocks and value increased by $2 how much will I profit total profit = no of shares * profit per share

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1what I am saying is you are putting too much together as one

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0I see I need to break it up into two parts and this would still be a function right?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1saying here you have 2 functions

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1sounds a little more challenging made an initial investment in jet blue of 2000 when share were 22.30/share if now value is 24.64 how much did I profit?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1do you see this is YOUR example with both parts. I just worded it so that it flows and leads into what you are doing in terms of how to solve

triciaal
 one year ago
Best ResponseYou've already chosen the best response.1profit = change in price * no of shares

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.0I see you worded the question so someone could answer it where I just answered it without a clear question.
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