Answer:
A
Step-by-step explanation:
The graph decreases to a minimum then turns and increases.
This is a minimum and occurs at the vertex (1, - 4 )
0.9836
y & x
y = kx
When y = 6 , x = 72
6 = 72k
k = 6/72
k = 1/12
:- y = x/12
When x = 8
y = 8/12
y = 2/3
E(X) = 0.64
Sd(X) = 0.933
3(0.07) + 2(0.11) + 1(0.21)
E(X²) = 3²(0.07) + 2²(0.11) + 1²(0.21)
= 1.28
Var(X) = 1.28 - 0.64² = 0.8704
Sd = 0.933
Using the law of indices
5 X 5^-3
5^1-3
5^-2
