2x(-7)^2-9 = 2x49-9=98-9=89 maybe
Answer: YES
Plug in the numbers in your head.
y=3(10)+7
y=30+7
y=37 which is the y intercept
When the standard deviation = 0, there is no deviation at all. So the numbers are all the same. And there are seven of them. And the average is nine.
So the sample data set would just be seven 9s.
All possible roots is the attachment
X=-1,-1/4,-4
Factor with the GCF 1