Question

Based on your line of best fit, give your best prediction below for how many grams of fat you would expect to find in a food that contains 38 calories from fat.

Answer 1

what's your best fit line?

Answer 2

Fat contains 9 calories per gram, so about 4 grams of fat in this food

Answer 3

i dont even know what that is i copied the question as it is.

Answer 4

how did u find that out @Tauist628

Answer 5

The internet is a great source for general knowledge

Answer 6

\[y = \frac{ 1 }{ 9 } x \text{ where }x = \text{ calories from fat}\]

Answer 7

y is the number of grams in your sample

Answer 8

what you mean by that?

Answer 9

If you wanted to be as accurate as possible then y=38/9 grams

Answer 10

how did u get that answer.

Answer 11

From pgpilot326's equation, if you plug in 38 for x you arrive at the answer that I've just given you

Answer 12

if there are 9 calories per gram of fat then this is a fraction, which is a conversions factor. every conversion factor behaves like the number 1 because the numerator and denominator have an equivalence...
\[\frac{ 9 \text{ calories from fat} }{ 1 \text{ gram of fat} }\]
with this conversion factor you can find the number of calories from a given quantity of fat (in grams)

but because of the equivalnce, you can the reciprocal to convert the other way round...
\[\frac{ 1 \text { gram of fat} }{ 9 \text { calories from fat} }\]

this gives you the number of grams of fat from a known number of calories (due only to fat)

Answer 13

so this the right answer @pgpilot326

Answer 14

typically, a best fit line is based on data you've obtained or were given as part of the problem statement. if you weren't given any then the question doesn't make too much sense to me. but, it's generally accepted that each gram of food fat contains 9 calories (food calories) so the equation makes sense.

Answer 15

yeha i wasnt given one but it might be 9

Answer 16

this question only ask for the number of grams of fat from 38 calories. 4.2222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222... is the answer based on 9 calories from each gram of fat

Answer 17

were you given any data?

Answer 18

a chart came for a previous question i dont know id it goes with this qauetion

Answer 19

http://learn.flvs.net/webdav/assessment_images/educator_math3/v8/06_AK_02_001a.jpg

Answer 20

you need to do a screen shot and post that

Answer 21

so use the data to make a line of best fit...

x = calories from fat and y = grams of fat

Answer 22

this is a stats class, right?

Answer 23

if its a what

Answer 24

so was that the answer or the problem

Answer 25

do you know how to find a best fit line?

Answer 26

no

Answer 27

i dont

Answer 28

http://www.youtube.com/watch?v=1pawL_5QYxE

have a look and let me know if this helps...

Answer 29

ill make sure of that but im trying to finish so much work befor tomorrow

Answer 30

isnt best fit finding what bets fit ur data

Answer 31

yes, but it's an undefined term... best fit how? minimizing the vertical error (least squares) or how?
typically when stating "best fit", most suppose linear least squares

Answer 32

ok but ughhh i cant solve it for nun

Answer 33

?

Answer 34

what is your average x value?

what is your average y value?

Answer 35

what u mean

Answer 36

we been typing back and forth and still havent got no where yet

Answer 37

unfortunately you have some very large gaps in knowledge and understanding.
i don't give out answers and it would take a very, very long time to get you up to speed on this topic. i suggest you review your material and if you have specific questions then I could perhaps help you. good luck!

Answer 38

lol i dont have any large gaps come correct lmfao i just didnt understand the question thats all.be specific ok :)

Answer 39

from my previous post:
so use the data to make a line of best fit...
x = calories from fat and y = grams of fat

and another following

what is your average x value?
what is your average y value?

what you got?

Answer 40

ok and thats all i gotta do

Answer 41

no

Answer 42

http://www.statisticshowto.com/articles/how-to-find-a-linear-regression-equation/

please have a look

Answer 43

A solution using Mathematica is attached.