If Cov(X,Y)=−0.5Cov(X, Y) = -0.5Cov(X,Y)=−0.5 and σX=1,σY=1\sigma_X = 1, \sigma_Y = 1σX=1,σY=1, what is the correlation ρ(X,Y)\rho(X, Y)ρ(X,Y)?
-0.5
0.5
-1
0