Question

The data in the table show how long (in minutes, t) it takes several commuters to drive to work. Find the correlation coefficient and the equation of the best fit for the data. Treat the commute distance d as the independent variable.

Answer 1

Answer: r ≈ 0.75

t ≈ 0.8d + 11.5

Explanation:

You have to use a graphing calculator to solve this problem.

This is the correct answer (I just took the test).

Answer 2

Given the set of data

sort

Commute data (x)

24,25,27,30, 35,35,46,50,52

Commute distance (y)

20,20,29,20,34,39,29,34,50

The line of best fit is given by

with

`R^2=0.5592`
`R=√(0.5592)`
`R=0.747`

R= 0.75

with function

`t=0.7+5.5`

Correct answer

option D