Answer:
2.4
Step-by-step explanation:
We would first calculate the mean, because we would need it to calculate our varance.
Mean= sum of the number of given data set/ total number
Mean = (9 +8 +9 +5 +9 )/5
= 40/5= 8
variance (σ2):= [(9-8)^2 + (8-8)^2 + (9-8)^2 +(5-8)^2 +(9-8)^2]/5
=( 1+ 0 + 1 +9 +1)/5
= 12/5
variance (σ2)= 12/5
=2.4
Answer:
Equation of parabola: 8*(y - 2) = (x - 3)^2
or
y = (1/8)*(x - 3)^2 + 2
Step-by-step explanation:
focus at (3,4) and its directrix y = 0.
Focus equation: (h, k + c) = (3, 4)
Directrix equation y = k - c = 0
so h = 3, k + c = 4, k - c = 0
Solve the system : k + c = 4 and k - c = 0
add the equations together: k + c + k - c = 4 + 0
2k = 4
k = 2
so k + c = 4, 2 + c = 4, c = 2
4c (y - k) = (x - h)^2
4*2 *(y - 2) = (x - 3)^2
8*(y - 2) = (x - 3)^2
It could be a box plot or a Histogram