You are here:
Advanced Math/pre calc
Advertisement
Question
the machine is baught for 1000 dallors and after 5 years value is 100 dallors
find a formula for the value V of the machine after t years where 0 is less than equal to t and less than or equal to 5.
This all depends on if the price depreciates 'linearly' which I am assuming it is so then you have two sets of points (0,1000) and (5,100) where the ordered pair is (time, value). Now just find the slpe and put it into slope intercept form: (1000-100)/(0-5) = 900/5 = -180. Use either point in the point slope form of a line: y - 100 = -180(x-5) -> y = -180x + 1000
Math Prof
Related Articles
Advanced Math
Answers by Expert:
Sherry Wallin
Expertise
I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.
Experience
I have had my Bachelor's Degree since 1987 and have been a teacher since 1988. I earned my Masters Degree in Mathematics May 2010. I have been teaching at the same community college since 2002.
Education/Credentials
I have taught 12 years at the community college level, medical college, and technical college as well as a high school instructor and alternative education instructor and charter school instructor.
Awards and Honors
Master's GPA 3.56
Bachelor's GPA 3.34
Post grad work not degree related GPA 4.0
©2012 About.com, a part of The New York Times Company. All rights reserved.