Astudy of the relationship between age and various visual functions (such as acuity and depth perception) reported the following observations on the area of scleral lamina (mm2) from human optic nerve heads: 2.77 2.70 2.76 3.92 2.38 2.64 3.91 4.13 3.83 4.30 3.45 4.42 2.49 3.66 2.83 3.58 3.11 (a) calculate σxi and σxi2. (round σxi2 to two decimal places.)

d

step-by-step explanation:

by observation, we can see that the the graph is simply the graph of y = |x| that has been shifted 4 units downwards and 3 units to the left.

we can recognize in choice d :

y = | x + 3 |   - 4 (rewriting in general form)

y = | x - (- 3) |   - 4

the "-4 " term means   that the graph has been shifted by 4 units in the negative y direction

the "-3 " term means   that the graph has been shifted by 3 units in the negative x direction

this matches our observation of the graph described above.

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice