Question

Help me with a few questions??

Answer 1

@jim_thompson5910

Answer 2

Post your questions.

Answer 3

ok one second...

Answer 4

The table below shows the distance y, in miles, traveled by a toy car in x minutes:

Time (x)
(minutes) 10 20 30 40
Distance (y)
(miles) 4 8 12 15


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 distance traveled by the toy car.
[Choose the value of correlation coefficient from 1, 0.99, 0.5, 0.02]

Part B: What is the value of the slope of the graph of distance versus time between 10 minutes and 30 minutes, and what does the slope represent?

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

Answer 5

@jim_thompson5910

Answer 6

what did you get?

Answer 7

so for part a....i got positive correlation of 1

Answer 8

why 1?

Answer 9

cuz the x-values increase while the y-values increase

Answer 10

how much are the x values increasing each time?

Answer 11

10

Answer 12

how much are the y values increasing each time?

Answer 13

4 4 4 and 3

Answer 14

if that last 3 was a 4, then the correlation coefficient would indeed be 1

a correlation coefficient of +1 means all points lie on the same line with positive slope

Answer 15

but not all points are on the line

nearly all of them are

Answer 16

oh okk

Answer 17

so would it be 0.99

Answer 18

yeah it's going to be pretty close to +1, but not exactly equal to +1

Answer 19

ok thank you.. So for part B i would just do 8-4/20-10= 2/5

Answer 20

@jim_thompson5910