Question:
Which description represents the transformation shown? The pre-image is shown in blue, and the image is shown in red.
Answers:
a- translation by rule (x + 9, y + 0)
b- rotation 180 degrees about the origin
c- reflection across the y-axis
d- dilation with factor 2

Question

Question:
Which description represents the transformation shown? The pre-image is shown in blue, and the image is shown in red.
Answers:
a- translation by rule (x + 9, y + 0)
b- rotation 180 degrees about the origin
c- reflection across the y-axis
d- dilation with factor 2

anonymous · Answer

attachment

anonymous · Answer

@funinabox help!!

anonymous · Answer

I think it's b

anonymous · Answer

can you tell me how you got that

anonymous · Answer

okay, I'm pretty sure it's b. The only way you can check for sure is by drawing lines through the origin with the default image. then, draw the lines with the transformed image. then, use a protractor.

anonymous · Answer

well... that;s how i learnt it at least...

anonymous · Answer

See how every point is at the same distance from the origin as it was originally, but has changed signs in both coordinates. This clearly suggests b.

anonymous · Answer

And to confirm my suspicion, I used the elimination method, which left me with b.