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Graphing

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Back in Caveman days, there was only

one way to measure where you were.

NUMBER LINE

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Theres Trogthe caveman. He usually

hunted around number6.

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Then he would go home, which

was at 0

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Nobody ever left the trail. You just

didntdo it!

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BUT..One day, Troggets crazy and

LEAVES the path!!

NOBODYever did this before!!!!

It was TOTALLY CRAZY!!

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Now Trog is lost. Hes not on the number

line. How do we tell where Trog is?

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Easy!! With TWO number lines!

One will measure sideways

The other will measure

up and down!!!

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Where is Trogfrom

his house?

Start Here

6 sideways,

5 up !

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These two number lines

put together is calledThe Coordinate Plane

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The line that measures

sideways is called

thex-axis.

SIDEWAYS = X

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The line that measures

up and down is called

The y-axis.

Upand

Dow

n=Y

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Where the lines meet is called the Origin

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Lets Practice.

Give the coordinates:(4,10)

(-2,2)

(-6,-4)

(4,-2)

(0,0)

a.k.a:THEO

RIGIN

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The COORDINATE PLANE used to show

how TWO THINGS ARE RELATED.

Lets see how Hours of Daily Sunlightaffects

How Tall Plants Grow:

2016129731.510PlantHeight

(inches)

1614121086420HoursSunlight

per day

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(inches)

1614121086420Hours

Sunlightper day

This is the part YOU control.

Called theINDEPENDENT VARIABLE

This is what

CHANGESAS A RESULT.This shows WHAT HAPPENS

Called the DEPENDENT VARIABLE

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2016129731.510

Plant

Height

(inches)


What happens here DEPENDS ON.

What you did here!!

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(inches)


All of the numbers from theINDEPENDENT VARIABLE

are known as theDOMAIN

All of the numbers of theDEPENDENT VARIABLE

are known as theRANGE

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2016129731.510Plant

Height(inches)


Numbers in the DOMAIN

are graphed on theX-AXISNumbers in the RANGEAre graphed on the Y-AXIS

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(inches)

1614121086420HoursSunlight X

Y

Each match up to form aCOORDINATE PAIR

that you can graph!

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(inches)

1614121086420HoursSunlight X

Y

LETS GRAPH IT !!!!!!

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