1. The problem statement, all variables and given/known data If the slope of the regression line is negative and the correlation coefficient is -0.5, coefficient of determination is: 2. Relevant equations coefficient of determination: r2 = 1 - SSE/SST correlation coefficient: r = Sxy / (√Sxx * √Syy ) 3. The attempt at a solution r = -0.5 r2 = 0.25 but because slope of regression line is negative, then coefficient of determination would be also negative. r2 = -0.25 I am not sure if my though process in determining the correct answer is right or not.