Moisture content in percent by volume (x) and conductivity in mS/m (y) were measured for 50 soil specimens. The means and standard deviations were  = 8.1, sx = 1.2,  = 30.4, sy = 1.9. The correlation between conductivity and moisturewas computed to be r = 0.85. Find the equation of the least-squares line for predicting soil conductivity from moisture content.