SOLUTION: Triangle ABC is drawn in QuadrantIII.If triangle ABC is reflected in the y axis,what quadrant will the image lie in?

Let's draw a triangle in Quadrant III:



Now let's reflect that triangle in the y-axis.

Pretend that the y-axis is a mirror facing the triangle.

Then where would it look like the triangle's image would be?

It would be like this, right? 



That's Quadrant IV!

Edwin