Answer:
Logarithmic
Step-by-step explanation:
For this exmaple, x is the one increasing by a third power for every y
Logarithmic is the opposite of exponential
Exponential is when y is the one increasing by a power for every x.
Therefore this one is logarithmic.
Answer:
Modification has not reduced the number of accidents.
Step-by-step explanation:

A B C D E F G H
Before modification 5 7 6 4 8 9 8 10
After modification 3 7 7 0 4 6 8 2
Difference -2 0 1 -4 -4 -3 0 -8
Mean of differences 
Standard deviation of differences = 
Formula of paired t test :

Df = n-1 = 8-1 =7

t critical> t calculated
So, We failed to reject null hypothesis
Hence modification has not reduced the number of accidents.
Answer:
1 1/20 is the correct way
Step-by-step explanation:
I don't know how to get it but i just looked it up .
Answer:
x= -15
Step-by-step explanation:
20 degrees
vertical angles are equal, so 5x-80=x
solve for x and you get 20