Question

Please Help Algebra 1 question...
Medal + Fan :)

Answer 1

The table represents data collected on the time spent studying (in minutes) and the resulting test grade.

Time Spent Studying (min) 52 37 31 9 26 40 22 10 45 34 19 60
Grade on Test 95 84 72 58 77 86 72 43 90 81 62 98

Answer 2

Part 1: Create a scatter plot with the predicted line of best fit drawn on it. Determine the type of correlation (if any), and predict the model that will be used.
Part 2: Find the line of best fit for the data either by hand or using technology. Explain your method. Find the predicted score for each time listed in the table.
Part 3: Find the residuals, and decide if your model is a good fit. Explain your method. (If your model is not a good fit, complete Part 2 again with a different set of points or choose a different model.)

Answer 3

so take it one step at a time

Answer 4

do u know how to make a scatter plot?

Answer 5

I'm pretty sure that your computer has \(Excel\) which you can use to create a scatter plot!.
Then, right-click on one of the points, then click "add trendline" which is like best-fit line.

Answer 6

No, I have a mac... also I have done a few things in the first part.

Answer 7

Positive correlation, and a linear model with a positive rate of progress will be used.

Answer 8

a scatter plot is basic just make a graph like the one in a screenshot and put grade on the bottom and time spent studying on the left, then fill in points

Answer 9

what do you mean fill in points?

Answer 10

Mac should come with Excel when you bought it. You can get the student version of office that comes with Excel, PowerPoint and Word.

Answer 11

oooh... would numbers do?

Answer 12

numbers (something like excel)

Answer 13

look it up :) I dont have excel :(

Answer 14

for example. the first grade on the test is a 95, you would go to the 95, then go up to 52 (which is the time spent studying, then put a dot there, you would do that with each set of numbers

Answer 15

Could you show me? :)

Answer 16

@alex1248191

Answer 17

yep!

Answer 18

like that but your numbers can be whatever u want as long as they include the given

Answer 19

thanks, do you think you could help add points to the graph. would the first point be at (52,95) ???

Answer 20

yes, except you would look at 95 first then go to 52

Answer 21

ok thanks... ill graph it...

Answer 22

doesnt this already have points?

Answer 23

so @alex1248191

Answer 24

sorry i had to leave my computer for a sec, and yes it does,

Answer 25

ok so next step... Determine the type of correlation (if any)... I said - Positive correlation, and a linear model with a positive rate of progress will be used.

Answer 26

Yes that is correct!

Answer 27

ALRIGHT! :) Time for Part 2 :)

Answer 28

Find the line of best fit for the data either by hand or using technology.

Answer 29

Sorry about that before...

Answer 30

what does it mean to find the line of best fit for the data either by hand or using technology?

Answer 31

it mean to find the line that best fits for all of the data you have entered

Answer 32

Dont I already have one? No?

Answer 33

Yes you do, so that one is the best fitting one

Answer 34

Ok, so now I have to explain my method...

Answer 35

ok, so explain to me the methid

Answer 36

IDK... I just planted the points and I forgot what next...

Answer 37

you used the graphing method sence you graphed the points

Answer 38

didnt mean to send that last message again

Answer 39

yeah I guess so

Answer 40

@alex1248191

Answer 41

so you got it now!

Answer 42

kinda... explain it to me

Answer 43

Ok, so the method you used is the graphing points methond,, you looked at the graph and filled in the points at the appropiate spot, you then looked at the date and decided that the line draw best fits that graph

Answer 44

yeah... so could I write this? : I looked at the graph and filled in the points at the appropiate spot, you then looked at the date and decided that the line draw best fits that graph.

Answer 45

@alex1248191

Answer 46

yep!

Answer 47

I have written this so far for part 2... My best line of fit is in the graph above and would have a slope of m=15x+45.

Answer 48

that good

Answer 49

The graph above is the one we have

Answer 50

Can you now help me to find the predicted score for each time listed in the table.

Answer 51

@alex1248191

Answer 52

im not sure how to do that, i'll get back with you asap, imma figure it out

Answer 53

ok

Answer 54

you got anything?

Answer 55

have you got anything?

Answer 56

naw not yet

Answer 57

ok tell me when you get something

Answer 58

ight