Answer:
The slope of the line is -3
Step-by-step explanation:
I chose the points (-2,3) and (0,-3)
The slope formula: m=
==>
==>
= 
Our final answer is -3.
Hope that helps!
Number of ways the second grade students can sit on the first row is 5! = 5P5
Number of ways 15 first grade students can sit in the remaining 20 seats is 20P15
Therefore, required number of ways is 5P5 * 20P15. (option B)
5+5= 10
10 time 9b is 90b
10 times -7 is -70
Then 90b-70
The mean, because data distribution is skewed to the right. You answer is correct