A grinding machine in an auto-parts factory prepares axles with a target diameter of u = 40.33
millimeters (mm). The machine has some variability, so the standard deviation of the diameters
is o = 0.006 millimeter. The machine operator inspects a random sample of 9 axles each hour for
quality control purposes and records the sample mean diameter x

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.

agree

step-by-step explanation:

the answer to your question is b.