Question

The table below shows the velocity y, in miles per minute, of a toy car at different times x, in minutes:

Time (x)
(minutes) 10 20 30 40
Velocity (y)
(miles) 0.2 0.8 0.1 0.4

Answer 1

Part A: What is the most likely value of the correlation coefficient of the data in the table? Based on the correlation coefficient, describe the relationship between time and velocity of the toy car. (4 points)
[Choose the value of correlation coefficient from -1, 1, -0.04, 0.99]

Part B: What is the value of the slope of the graph of velocity versus time between 10 minutes and 20 minutes, and what does the slope represent? (3 points)

Part C: Does the data in the table represent correlation or causation? Explain your answer. (3 points)

Answer 2

Part A: The most likely value of the correlation coefficient of the data is -0.04. And there is no relationship between the velocity and time.

Part B: so i calculated the slope between 10 and 20 minutes which is .06 when i used the formula y2-y1/x2-x1 which is .6/10 so the slope turns out to be .06 in between 10 and 20 minutes. the slope indicates that the velocity is increasing at a relatively slow rate from 10 mins to 20 mins.

Part C: zero correlation

Answer 3

is this correct?

Answer 4

@Michele_Laino

Answer 5

for part A have you applied the right formula?

Answer 6

i think so

Answer 7

the correlation coefficent one

Answer 8

ok! Then your answer are right, since a correlation coefficient which is far from 1, means that there is no causality relationship

Answer 9

answers*

Answer 10

but wait did you check it for me like the actual numbers?

Answer 11

please wait...I'm checking your value...

Answer 12

did you get them yet?

Answer 13

please wait, I redo my computations

Answer 14

I got this value:
r=-0.0417

Answer 15

okay same thats what i got

Answer 16

how do you just leave me just to help someopne else ? @Michele_Laino

Answer 17

yes!

Answer 18

dude chill i needed her/him to check my answers and now she can help you again

Answer 19

you are right, please you have to understand me, I receive several requests for help!

Answer 20

um no first i wasnt even talkign to you so please mind your buisness @knightmare6

Answer 21

welll one you came onto my question so uhh?

Answer 22

you i came onto your question to say some to @Michele_Laino and second again i wasnt talking to you and third again i wasnt talking to you.

Answer 23

@knightmare6

Answer 24

you make no since leave please