Sample mean is
Sample standard deviation is unchanged.
When shrinking an image, the size of each side is shrunk by the scale factor. However the area is not shrunk by the same factor. Area is a squared measurement (when finding the area of a rectangle we take length x width; two measurements, so a squared answer), so the area will be shrunk by the scale factor squared; in this case the area is shrunk by 3² or 9. This means the new area would be 720/9 or 80 square inches.
Answer:
It equals 256 because 2x2x2x2x2x2x2x2= 256
d,
If you change the y-intercept but keep the slope the same, it just moves the line up or down. Since the lines would have the same slope (same rate of change), the two lines would be parallel.