A straight line is drawn through the points (3.0, - 3.87 × 104), (10.0, - 12.99 × 104), (20.0, - 25.93 × 104), (30.0, - 38.89 × 104), and (40.0, - 51.96 × 104) to give m = - 1.298 72 × 104, b = 256.695, sm = 13.190, sb = 323.57, and sy = 392.9. Express the slope and intercept and their uncertainties with reasonable significant figures.