An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges in the Congo. To study the spread of the virus, measure distance by the number of home ranges separating a group of gorillas from the first group infected. Here are data on distance and number of days until deaths began in each later group:

Distance????

x 1 5 4 3 3 6

Days????

y3 19 29 40 41 45

Find the correlation????

rbetween????

xand????

y.

r =