(above) Data Table

IncandescentCompact

Fluorescent (CFL)

Light Emitting Diode (LED)

$0.50 each $3 each $5 each(60 Watt or equivalent – per 1000bulbs.com)

$0.006/hr $0.0014/hr $0.001/hr(2015 Bend power rates over 25,000 hours)

What’s the better buy based on total cost?

(purchase price and power used)

A gift for

you…

Other things to consider!

Other things to consider!

• Lifespan of bulbs! • INC ~1200 hours• CFL: ~8000 hours

• LED ~50,000 hours

• Hg

• Price over time

Year 

Number of Uninsured 

1992 35,000,0001994 38,000,0001996 39,000,0001998 41,000,0002000 44,000,000

Years after 1990 Number of Uninsured (in millions)2 354 386 398 4110 44

Years after 1990 Number of Uninsured (in millions)2 354 386 398 4110 44

(above) Data Table

(left) Scatterplot

(x = years since 1990, y = millions of uninsured)

2 22 2

22

y

(slope calculated from data) ( intercept, also calculated from data)

mx b

y mx b

y x y

n xy x y n xy x yy x y x

n x x n x x

n xy x y n xy x yy x y

n x x n 22 "error"

xx x

Let’s find the linear model!

Use the gift!

There “are” actually 48.2 million uninsured Americans under 65 now (source: http://www.cdc.gov/nchs/fastats/hinsure.htm)

INTERPOLATION   versus   EXTRAPOLATION

Season Starting Full – day, adult ticket price ($)1983 171984 181985 201986 211987 231988 241989 261990 291991 311992 311993 331994 331995 351996 361997 391998 411999 412000 432001 unknown2002 442003 unknown2004 492005 522006 522007 56

Missing years’ prices?

This year?

The future?

http://www.columbia.edu/~jeh1/mailings/2015/20150116_Temperature2014.pdf

http://www.dailymail.co.uk/news/article-2915061/Nasa-climate-scientists-said-2014-warmest-year-record-38-sure-right.html