Answer:
I believe it is the last choice.
Step-by-step explanation:
The answer is A: A uniform probability model is a good model to represent probabilities related to the numbers generated in Pedro's experiment.
and B: It is likely that the spinner is fair.
The slope (or average rate of change) formula is:

. It is easy to remember as "slope is easy and fun, rise over run" where the y-values of the 2 points would be the "rise" and the x-values of the 2 points would be the "run" So with two points, you label one point as

and the other as

. Then you insert these points into the slope formula (m represents slope). So,

where (-3,6) is x2 and y2 and (5,1) is x1 and y1. It would simplify to

.
One way to solve:
960-12x=816
144=12x
12=x
Another way to solve
80-x=68
x=12
27.5
Follow the order of operations and start by solving the parentheses.
18 + 19 / 2
Now, do the division.
18 + 9.5
Finally, solve the addition.
27.5