Question

help!!

Answer 1

Compare rates of change.

A. The equation below can be used to find the length of a foot or forearm when you know one or the other.

(length of the foot) = 0.860 • (length of the forearm) + 3.302

If you let y = length of the foot and x = length of the forearm, this equation can be simplified to
y = 0.860x + 3.302.

Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

B. What is the rate of change of the equation from Part A?

Compare the equation from Part A to your data. Are they the same? Which has a greater rate of change? Why do you think the values are different?

C. Is the relation in your data a function? Why or why not? Could the equation in Part A represent a function? Why or why not? Explain your answer.

Answer 2

@Mehek14 @supersmart1001

Answer 3

Do you still need help? I may be able to work this out if you give me a minute :3

Answer 4

yea i do!!

Answer 5

can i tell you the whole assignment so you understand it better :)

Answer 6

ok!!!

Answer 7

Part 1:
You will need to measure five different people. Record your measurements on a piece of paper. Using a tape measure or ruler, measure the length (in inches) of a person’s left foot and then measure the length (in inches) of that same person’s forearm (between their wrist and elbow). Refer to the diagrams below. You will have two measurements for each person.
1- Left foot : 9.3 in Forearm : 8 in
2- Left foot : 9.5 in Forearm : 7 in
3- Left foot : 9.6 in Forearm : 7.5 in
4- Left foot : 10.3 in Forearm : 9 in
5- Left foot : 10.5 in Forearm : 10 in

Answer 8

Part 2:
Organize your data and find the rate of change.
A. Create a table of the measurements for your data. Label the forearm measurements as your input and the foot measurements as your output.


B. Select two sets of points and find the rate of change for your data.
8 and 9.3 , 9 and 10.3 .
10.3 - 9.3 / 9-8 = 1/1
So the rate of change is 1.
C. Describe your results. If you had to express this relation as a verbal statement, how would you describe it?
Relation, as x increases by 1, y increases by 1 as well.

Answer 9

that picture is for A.. :)

Answer 10

now i need help on part 3..

Answer 11

do you get it more ? lol

Answer 12

Yeah give me a sec and I think I can get it

Answer 13

ok part 3 is :

Compare rates of change.

A. The equation below can be used to find the length of a foot or forearm when you know one or the other.

(length of the foot) = 0.860 • (length of the forearm) + 3.302

If you let y = length of the foot and x = length of the forearm, this equation can be simplified to
y = 0.860x + 3.302.

Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

B. What is the rate of change of the equation from Part A?

Compare the equation from Part A to your data. Are they the same? Which has a greater rate of change? Why do you think the values are different?

C. Is the relation in your data a function? Why or why not? Could the equation in Part A represent a function? Why or why not? Explain your answer.

Answer 14

got it? :)

Answer 15

ok...

Answer 16

ok...
so what is the answer for A?

Answer 17

The equation below can be used to find the length of a foot or forearm when you know one or the other.

(length of the foot) = 0.860 • (length of the forearm) + 3.302

If you let y = length of the foot and x = length of the forearm, this equation can be simplified to
y = 0.860x + 3.302.

Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

Answer 18

can you help me with that please..

Answer 19

both

Answer 20

hold on hold on, im so confused!

Answer 21

wait, are you using my table? or are those just random examples?

Answer 22

wait whats A again? can you give me the complete answer in one post :)

Answer 23

yeah lol Ill do that

Answer 24

ok thx!

Answer 25

can I give it in a word document?

Answer 26

um, what do you mean?

Answer 27

Like type it in a word document and attach it

Answer 28

ok... but do it on google doc

Answer 29

mt laptop it being dumb and keeps deleating what I type cus of slow wifi

Answer 30

because i dont have office.. lol

Answer 31

are you doing it?

Answer 32

@ThatEmoKid66 you there?

Answer 33

helloo?

Answer 34

it wouldnt let me attache it on google doc

Answer 35

can you open it?

Answer 36

ok i cant open it, so can you just post it here.. lol

Answer 37

Part A:
Y = 0.860(17) + 3.302
Y = 14.62 + 3.302
Y = 17.922
So when the forearm is 17in the foot is 17.922in

Answer 38

ok lol that is easier :)

Answer 39

Part B
Now ill make a rate of change equation for the given equation:
Y = x*c
Y = foot length
X = forearm length
C = an unknown constant
Solve for c:
17.922 = 17c
17.922/17 = c
1.05 = c
So the rate of change for the given equation is 1.05

The equation that I made using the info from your table would be:
X = 0.83(y)
Or ‘
Y = x/0.83
So YOUR rate of change is 0.83
The rate of change from the given data is greater than the rate of change from my data
I think this is because my data was actually measured where the given equation is a generalization of a foot to forearm ratio.

Answer 40

Part C
The relation in my data is a function because for each input there is only one output and there are not repeating x or y values in the data
The equation in Part A can also represent a function for the same reasons.

Answer 41

there that worked

Answer 42

wait why did you use 17 in parantheses?

Answer 43

Thats all I got but I hope it helps

Answer 44

why did you use 17 in parantheses? Y = 0.860(17) + 3.302

Answer 45

it just means to multiply it by 0. 860

Answer 46

you can use 0.860 *17 if you want

Answer 47

i know but why did you use the number 17?

Answer 48

@ThatEmoKid66 ?

Answer 49

I used 17 because it said so in the question

Answer 50

Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

Answer 51

@volleyballlover55 does that make sense?