Point O is the center of dilation. Triangle D E F is dilated to create smaller triangle D' E' F'. The length of O F' is 3. The length of F' F is 7. What is the scale factor of the dilation of triangle DEF? Three-tenths (3/10)

Three-sevenths (3/7)

Seven-thirds (7/3)

Seven (7)

The image of abc is a'b'c. what transformations would result in this image? abc is reflected over the line x = 1, then is rotated -90° around the origin. abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1). abc is rotated 90° around the origin, then is reflected over the y-axis. abc is rotated -90° around the origin, then is reflected over the line y = -1.