1) find the mean,
20+10+30+20+50+30+40+20/8= 27.5
2) Find the distance of each value from that mean
20- 7.5
10- 17.5
30- 2.5
20-7.5
50- 22.5
30- 2.5
40- 12.5
20- 7.5
3) Find the mean of those distances
7.5+17.5+2.5+7.5+22.5+2.5+12.5+7.5/8=10
The Mean absolute deviation for this data set is 10.
3/8 + 1/16= 7/16
so it's c. 7/16
Answer:
-x aka -1
Step-by-step explanation:
x1 y1 x2 y2
9 -2 4 3
m= y2 - y1/x2 - x1
m = 3 + 2/4 - 9
(The "-" sign turned positive because it is negative times negative)
5/-5
Simplify: 5/-5 = -1 = -x
The slope of this line is -x