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7/30/2019 Algeo Newspaper Article Myeong Jin
http://slidepdf.com/reader/full/algeo-newspaper-article-myeong-jin 1/2
By:MyeongJinChoi
Did you ever know how saving
electricity is crucial to theenvironment? Our world now is in
the developing stage striving to gain
more and more of the most popular
form of energy, electricity. Most of
our energy, unfortunately, comes
from the limited source, coal. Burning
coal sends off massive amounts of
greenhouse gasses known as CarbonDioxide, and that is the cause of our
massive global warming. Globalwarming affects our environment by
creating floods, melting down the ice
from both poles raising the sea level all
around the Earth, raising water
temperatures making the coral reefs
bland and massive changes in weather.
That is what Myeong Jin’s family
strives to prevent.
Here is what Myeong Jin Choi says inhis interview, “Why I do this is simply
because I want to have a good reply
when somebody asks me in the future,
‘what where you doing in the past to
prevent all this Global Warming? What
contribution did you make to sustain
our Earth.’”
In the last eight
months (sinceAugust), Myeong
Jin’s family has
applied many
changes to their
habits and activities
such as turning off
the lights after using a room, using the
air-conditioner twice a week andsetting the air conditioner to a certain
temperature, shutting off all electronic
devices at night, and turning the plug
connecter off when not charging my
electronic devices. Electronic devices
use their reserved battery even when
they are in sleep mode, so it is
important to shut it off when it is not
being used. Plug connecters eat up
electricity if you don’t switch it off soit is important to switch it off whenyou are not charging any devices.
Myeong Jin’s Family had some
difficulties four months after he set his
challenge, when he moved from a
small apartment in Riana Green
Condominium into a double-story
apartment in Ampang PutraCondominium. Luckily, Myeong Jin’s
Family manages to get used to his newhouse fast. He becomes aware that
since he is in a double story house, he
has to be extra careful about turning
off the lights of rooms in each floor
before going to another floor. Will
Myeong Jin be able to endure his
challenge and sustain the rate of
decreasing his KWH usage per month?
Myeong Jin’s Family Meets Their
Goal of Reducing Electricity
NumberofMonthsSinceAugust
K W H
7/30/2019 Algeo Newspaper Article Myeong Jin
http://slidepdf.com/reader/full/algeo-newspaper-article-myeong-jin 2/2
By:MyeongJinChoi
How to find the equation:
As you can see in the Electricity UsageGraph, there are two points on the
graph, which are the data for October,
which is 3 months since August and
February, which is 7 month since
August. For October, the number of
months since August () is 2 and the
KWH usage () is 400 KWH so in
ordered pairs, it would be (2, 400). For
February, the number of months sinceAugust () is 7 and the KWH usage
() is 369 KWH so in ordered pairs, it
would be (7, 369).
We can find the slope with the two
ordered pairs, (2, 400) and (7, 369), we
calculated, by subtracting the two
values (2 and 7) and the two values(400 and 369); after that, we will have
to make a fraction by putting as the
numerator and as the denominator.!!!
!""!!!"=
!!"
!which is the slope.
The standard form of a linear equation
is = + so if we put in the slope
we calculated, it would be
=!!"
! + . The in the equation
is the intercept, which is the point
where the line and the -axis meet, andthat is 420. The complete equation for
Myeong Jin’s Electricity Usage Graph
would be =!!"
! + 420. Now, with
the equation, we have to find how
many months Myeong Jin has to
continue reducing his electricity usage
in order to reach 300 KWH. We can
easily do that by putting 300 instead of
in the equation. Then, the equation
will be 300 =!!"
! + 420. When we
subtract 420 on both sides to get
alone, we get −120 =!!"
! and when
we multiply both sides by!!
!"which is
!!"
!
’s reciprocal.
The final equation is ≈ 11.6. That
means it is going to take approximately
11.6 months, which is close to a year,
in order for Myeong Jin to meet his
goal. That is approximately 1.45 times
the number of months Myeong Jin hascome so far. Will Myeong Jin be able
to accomplish his goal? Game Time:
Sudoku
Months (# of Months
since August)
KWH
(RG) August (1) 430
September (2) 358
October (3) 400
November (4) 337
(AP) December (5) 396
January (6) 419
February (7) 369
March (8) 388
His goal is to go down to 300 KWH but how many months will it take?
DataTableofMyeongJin’sKWHusagesinceAugust