WILL FAN AND MEDAL!
Triangle ABC below is reflected across the y-axis and then translated 1 unit right and 2 units down.
a) Write the coordinates of the vertices of the image after reflection.
b) Write a rule for the translation. Use arrow notation.
c) Write the coordinates of the vertices of the new image after translation.

Here's the pic: http://i50.tinypic.com/nwg0mb.gif

Question

WILL FAN AND MEDAL! 
Triangle ABC below is reflected across the y-axis and then translated 1 unit right and 2 units down.
 a) Write the coordinates of the vertices of the image after reflection.
b) Write a rule for the translation. Use arrow notation.
c) Write the coordinates of the vertices of the new image after translation.


Here's the pic:  http://i50.tinypic.com/nwg0mb.gif

anonymous · Answer

@iGreen

igreen · Answer

When we reflect something over the y-axis, we use the rule:

$\sf (-x, y)$

igreen · Answer

Multiply -1 to the x-values of each point on the figure in the graph.