ANSWER

EXPLANATION
From the graph, the coordinates of Y are:

We want to find the image of this point after a dilation by a scale factor of -½ about the origin.
The rule for the dilation is :

To find the coordinates of Y', we plug the coordinates of Y.


The first choice is correct.
No.
.. √162 = (√2)*(√81)
.. √81 +√81 = 2√81 = √324
Square root is a non-linear function. sqrt(a +b) ≠ sqrt(a) +sqrt(b)
10/3 which is the same as 3 1/3
1. x midpoint: (-9+4)/(2) = -2
2. y midpoint: (3+7)/(2) = 5
3. The midpoint is (-2,5)