7/30/2019 Algeo Newspaper Article Myeong Jin

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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

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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