Anormal distribution of scores has a standard deviation of 10. find the z-scores
corresponding to each of the following values:
a) a score that is 20 points above the mean.
b) a score that is 10 points below the mean.
c) a score that is 15 points above the mean
d) a score that is 30 points below the mean.

step-by-step explanation:

options

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)