?
Solved

Graph function

Posted on 2016-09-06
4
Medium Priority
?
136 Views
Last Modified: 2016-09-06
Can you please tell me how f(0), f(1), f(2).... is calculated?
screenshot4.jpgscreenshot5.jpgscreenshot3.jpg
0
Comment
Question by:mustish1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 74

Expert Comment

by:sdstuber
ID: 41786944
substitute the value for the variable and complete the arithmetic

f(x) = -0.8x(x-9)

so f(0) = -0.8*0(0-9)= 0(-9) =0

f(1) = -0.8*1(1-9) = -0.8(-8) = 6.4

and so on
0
 

Author Comment

by:mustish1
ID: 41786973
Can you please also explain the part B
0
 
LVL 74

Accepted Solution

by:
sdstuber earned 2000 total points
ID: 41787024
f(x) = g(x)

f(x) = -0.8x(x-9)
g(x) = 1.7x + 5.7

so  -0.8x(x-9) = 1.7x + 5.7

-0.8x^2 + 7.2x = 1.7x + 5.7

-0.8x^2 + 5.5x - 5.7 = 0

-10 * (-0.8x^2 + 5.5x - 5.7)  = -10 * 0  
       ----- this step what was done in your example except it wasn't shown

8x^2 - 55x + 57 = 0

use quadratic equation to solve for x

x = (-b +/- sqrt(b^2 - 4ac))/2a

a = 8
b = -55
c = 57

x = (55 +/- sqrt(55^2 -4*8*57)) / (2*8)

x = (55 +/- sqrt(3025 - 1824)) / 16

x = (55 +/- sqrt(1201)) / 16

x = (55 +/- 34.66) / 16

x = 89.66/16  or 20.34/16

x = 5.60 or 1.27
0
 

Author Closing Comment

by:mustish1
ID: 41787035
Thank You.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Phishing is at the top of most security top 10 efforts you should be pursuing in 2016 and beyond. If you don't have phishing incorporated into your Security Awareness Program yet, now is the time. Phishers, and the scams they use, are only going to …
Originally published Entrepreneur.com Booming numbers of freelancing professionals are changing the face of work. In the United States alone last year, the number of workers freelancing grew from 700,000 to 54 million, according to a Freelancers’…
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…
Suggested Courses

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question