Top right, it’s really easy just. Count the numbers
ANSWER
The scale factor is

EXPLANATION
The given triangle has vertices,

.
The vertices of the image triangle is,

.
The scale factor is given by

So we can use any of the corresponding sides to determine the scale factor,



Or



Or



The correct answer is C
Pick any number. Write it in place of 'x'. If the result is a true statement, then your number is a solution of the equation. Do it again with a different number. Then do it again. Does it matter what your number is ?
Answer: Option A
Center: (3,-2)
Radius: 6
Rewrite in standard form to find the center (h,k) and radius r.