Question

Can someone please help! I GIVE MEDALS!!

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 1

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

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?

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

@sangya21

Answer 3

given eq
y =0.860x +3.302
this eq is given in the slope form of a line
y = mx+c
m = rate of change

put x = 17 to find y

Answer 4

y=17.922

Answer 5

I think?

Answer 6

Part A = y = 0.860x + 3.302
y = 0.860 * 17 + 3.302 = 19.02

Answer 7

Can you help me on the second part too? I really need help.

Answer 8

rate of change = m = 0.860

Answer 9

what does the 'm' mean?

Answer 10

slope

Answer 11

oh okay.

Answer 12

what about the rest of it :
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?

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 13

I need help in that. Let me ask
@StudyGurl14 @DanJS

Answer 14

okay :)

Answer 15

hi

Answer 16

Hi @DanJS please help

Answer 17

Hello, can you please help :)

Answer 18

ok which question

Answer 19

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?

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 20

where is your data? is there a table that goes with this?

Answer 21

this is what I have done:
Compare rates of change:
(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?
The foot would be 19.02 inches long.
y = 0.860 * 17 + 3.302 = 19.02 inches long.
rate of change = m = 0.860

Answer 22

I think there is some other data that is missing, a table or something, so you can use points from that to calculate a slope and compare that to the slope of the given equation

Answer 23

oh wait!

Answer 24

Input (Forearm) Output (Foot)
(Me) 10 inches 10 inches
~ (My mom) 9 inches 10 inches
~ (My brother) 10 inches 11 inches
(Baby brother) 4 inches 3 inches
(Dad) 12inches 12 inches

Answer 25

ok, so you need to use the equation
y-y1 = m(x-x1) where (x1,y1) are points in the table

Answer 26

Rate of change-
Change in forearm / change in feet
Change in forearm- 10 – 9 = 1
Change in feet- 11 – 10 = 1
Rate of change- 1/1 = 1
So the rate of change would be on because it is increasing by 1.

Answer 27

That equation is confusing!

Answer 28

For example, My mom (x,y) = (arm , foot)

Answer 29

so
my mom(x,y) = (9,10) need to find the rate of change and compare to the original equation rate of change

Answer 30

rate of change for first one - 1( is that right?)