Question

http://prntscr.com/badta3
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http://prntscr.com/badtvs

I'm not sure what they're wanting me to do or how to start. Any help?

Answer 1

The independent variable is the variable you control.
The dependent variable is the variable that is determined based on what the dependent variable is.

For example, the price of gas is $2 per gallon.

Gallons of gas Cost
1 $2
2 $4
3 $6
4 $8

I control the amount (number of gallons I buy), so the gallons is the independent variable. Once I have picked a number of gallons, then the price depends on the gallons bought. I don't control the price. The price is determined based on the amount bought.

Answer 2

sorry, but gtg.

Answer 3

So gallons is the independent variable and the price is the dependent variable?

Answer 4

@jhonyy9

Here you go.

(review what was said already)

Answer 5

sorry but i think i dont understand it clearly - @Loser66 please - ty.

Answer 6

@jim_thompson5910

What about you?

Answer 7

where are you stuck?

Answer 8

Let's see. Where do I start.

Well, firstly, is gallons the independent variable while the price is the dependent variable?

Correct?

Answer 9

yes in @mathstudent55 's example

Answer 10

but that wasn't the problem given to you

Answer 11

I'm a bit confused. I'm trying to answer part a first. You'll have to help me through all this though, preferably haha.

For a, I wouldn't put gallons as indp variable and price as the dep variable?

Alright, explain.

Answer 12

mathstudent55 put that as an example. Do you see how he set up that example?

Answer 13

Yes,

Answer 14

so just apply that idea to your first problem

Answer 15

The amount of sunlight is the indp variable and the height is the dep variable.

Answer 16

good

Answer 17

change the amount of sunlight, and the height will be dependent on that and change as well

Answer 18

Alright, for b, what do they mean by determine the graph to use?

Answer 19

well I think you're given a choice of pie graph, bar graph, scatter plot

or something like that

I think scatter plot is the best choice. Whenever you have 2 variables (where the other variable isn't frequency) and you want to compare the variables, then scatterplot is usually a good choice

Answer 20

Alright, we'll use that.

As for c, I'm confused what the topic is? Would a title like "The height of plants depending on the amount of sunlight" work?

Answer 21

`Would a title like "The height of plants depending on the amount of sunlight" work?` sure I don't see why not

Answer 22

Or you can ask `does the height depend on the amount of sunlight?`

Answer 23

Sounds good! Do we actually have to plot the values on the graph, or do they just want us to distinguish which graph is best for each circumstance?

Answer 24

it doesn't seem like they want the actual graph

Answer 25

Seems easy enough.

Alright for 2.

I think the independent variable is the students and the dep variable is the jeallybeans

I think the title should be "Amount of jellybeans consumed by different students"

I think the graph used should be a bar graph

Agreed or no?

Answer 26

You got all of that correct. Nice job.

Answer 27

Alright last one

Hold on

Answer 28

The indepen variable in this is the amount of fertilizer while the depenn variable is height of plants

The title is "The height of plants according to the amount of fertilizer used"

I'm having issues with what type of graph to use, what scale to use, and how to label the axis.

Answer 29

I would use a scatter plot for the same reasons as the first one

Answer 30

Alright, what about the scale and how to label the axis?

Answer 31

what's the smallest x value? the largest x value?

Answer 32

Hm, I'm not sure.

Answer 33

what's the smallest amount of fertilizer used?

Answer 34

5

Answer 35

the largest amount?

Answer 36

40

Answer 37

so I'd make the scale from 0 to 50

that way you can see the smallest and largest amounts, plus everything in between

I'd go by 5s since the left column is 5,10,15, etc

Answer 38

this is the x scale by the way

Answer 39

So the scale is 0 to 50
I have my title
I know the indepen variable and depen variable
I'm going to use a scatterplot

Lastly, how do we label the axis?

Answer 40

don't forget about the y scale

Answer 41

setting up the y scale has you deal with the second column of the table

Answer 42

So I need a scale for both the x and y axis?

The y one would be 0 to 17.3 right?

Also, how would we label them?

@jim_thompson5910

Answer 43

what's the smallest value in the second column?

Answer 44

11

Answer 45

largest value?

Answer 46

17.3

Answer 47

so why not go from 11 to 17.3

you can go by 0.5, 0.2, or 0.1 depending on how many tick marks you want to make

Answer 48

Why did we do 0 to 50 for the x axis?

@jim_thompson5910

Answer 49

because the first column spans from 5 to 45. I figure 0 to 50 is easier to deal with plus we capture a bit of empty space to the left and right

Answer 50

Alright, sounds good. Now, how do we label them?

@jim_thompson5910

Answer 51

you just place "amount of fertilizer" as a text label below the x axis

to indicate that the x axis refers to the "amount of fertilizer"

eg: x = 45 means we have 45 grams of fertilizer

the same will apply for the second column, but just for the y axis

Answer 52

Hm, I'm a bit confused.
@jim_thompson5910

Also, am I supposed to explain this to them or show them it?

Answer 53

I'd do both. Have the graph and just write a sentence or two about the label.

Answer 54

Sorry, I'm still confused about this part haha.

Answer 55

how so?

Answer 56

I'm not quite understanding how to label the axis or draw the graph

@jim_thompson5910

Answer 57

here's a good example of how to label

http://img.bhs4.com/77/5/7759E0CE60CD9D9116EB2E803B636253661DD275_large.jpg

the x axis here has `hours spent studying` and the y axis has `exam score`

Answer 58

So it would go by five's on the x axis?

Answer 59

What about for the y axis?

Answer 60

`So it would go by five's on the x axis?`
yes

Answer 61

`What about for the y axis?`
I'd increment by 0.5

Answer 62

Alright

I can make that

But I'm not sure how to plot the points

Answer 63

are you allowed to use technology? or do you have to do it by hand?

Answer 64

You can use technology

If you could show me that'd be nice : )

Answer 65

ok one moment

Answer 66

You there?

Answer 67

yes I'm setting up geogebra

Answer 68

are you able to install programs on your computer?

Answer 69

Yes why?

Answer 70

There is also a drawing pad here if you can use it

Answer 71

because it would be handy to install the program geogebra

Answer 72

it would be very tedious to draw it out by hand

Answer 73

http://www.geogebra.org/

Answer 74

Is that what you're doing? Your're doing it in the program?

Answer 75

tell me when you get that downloaded and installed

Answer 76

Alright, I got the one for chrome.
http://prntscr.com/bafu67

Answer 77

ok that should work, let me get that app real quick

Answer 78

ok click on the math apps tile, then click on the spreadsheet tile

Answer 79

in the spreadsheet, type in the data you're given

Answer 80

Alright

Answer 81

everything typed in?

Answer 82

Typed in?

Answer 83

yes the data values

Answer 84

I'm not sure how to work this thing

Answer 85

where are you at exactly?

Answer 86

do you see a spreadsheet and xy axis?

Answer 87

Yes

Answer 88

have you typed in the data values into the spreadsheet?

Answer 89

http://prntscr.com/bafx2i

I'm not sure how

Answer 90

http://prntscr.com/bafxdo

Answer 91

click on the cell in row A, column 1

then use the keyboard to type in the data value

hitting enter will move you down to the next cell

Answer 92

Like this http://prntscr.com/bafxzg

Answer 93

yes but you won't have 45 or 50 in column A

Answer 94

Alright now what

Answer 95

ok select all of the values in the table

then right click on the mouse, and go to "create --> list of points"

http://prntscr.com/bafysi

Answer 96

let me know when you've done that step

Answer 97

I'm done!