Assuming the question is in the wrong format and"date" is data. I chose X= 10,11,16,9,7,15,16,10 and Y= <span>96,51,62,58,89,81,46,51 the correlation cooefficent is -0.3351
F=frogs poblation, t=time, be the variables dF/dt = KF, dF/F=Kdt, integrating ⇒ LnF=Kt+c,; Knowing t=0, F=17 and t=6 F=51 (tripling every 6 days (17*3)), ⇒, so , now if F=130, t=? we have: