Students’ scores on an anthropology test have a mean of 31 with a standard deviation of 3.5 if rochelle scores 20 on her test, how many standard deviations away from the mean is her score

3.14

Step-by-step explanation:

The difference between her score and the mean is:

20 − 31 = -11

The number of standard deviations that equals is:

-11 / 3.5 ≈ -3.14

Her score is approximately 3.14 standard deviations below the mean.

21

step-by-step explanation:

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.