I would go with b. the mean age of all students in her middle school is likely to be close to 11.6.
Because she used a simple random sample, the outcome is likely to be an accurate representation of the entire middle school. It might not be exact, but likely close to 11.6.
0.09 is the answer, hope this helps
m =( Y2 - Y1)/ (X2-X1)
m =( 3-(-5))/ (-6-3)
m = - 8/9
I am assuming you meant a slope of 9/8 in your original question, so the points perpendicular to I are answer D.
Perpendicular means the slope is opposite reciprocal of your first slope given.
14ftsquared
2x2=4
5x2=10
10+4=14 ft squared