What Is a Function? 5
Gd
morning!
Here goes
nothing!
I’m dea---d.
Lunch
delivery?
Z
zz
z
z
z
z
...
Fling
6 Prologue
Wi you
leave it,
please?
Wait, what?
Oh, you have
bn aigned
here today.
I’m Noriko
Hikima.
Long trip,
wasn’t it? I’m
Kakeru Seki, the
head of this
oice.
The big guy there
is Futoshi Masui,
my only soldier.
Just
two of
them...
What Is a Function? 7
This is a gd
place. A perfect
environment for
thinking about
things.
Thinking...?
Yes! Thinking
about facts.
A fact is somehow
related to
another fact.
Unle you understand
these relationships,
you won’t be a real
reporter.
True journalism!!
We, you
majored in the
humanities.
Yes! That’s
true—I’ve studied
literature since
I was a junior in
high schl.
You have a lot of
catching up to do,
then. Let’s begin
with functions.
Fu...functions?
Math? What?
When one thing
changes, it influences
another thing.
A function is a
coelation.
You can think of
the world itself as
one big function.
A function describes a
relation, causality, or
change.
As journalists,
our job is to find
the reason why
things haen—
the causality.
Yes...
What Is a Function? 9
Did you know a
function is often
expreed as
y = f(x)?
Nope!!
For example,
aume
x
and
y are
animals.
Aume
x is a frog. If
you put the frog into
box f and convert it,
tadpole
y
comes out
of the box.
But, uh...
what is
f ?
The
f stands for
function, naturay.
f is used to show that
the variable
y
has a
particular relationship
to x.
And we can
actuay use any
leer instead
of
f.
Animal yAnimal x f

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