Which is greater -0.53 or-0.51

The graph shown is the graph of which function?

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?

What is the solution to this system of linear equations? x + y = 4 x - y = 6 (4,6) (6,4) (5, -1) (-1,5)