Question

A smiley face (orange) and its image (open) are graphed on the coordinate plane below. Which sequence of transformations maps the solid smiley face onto the open smiley face?A. reflect over x-axis, rotate 270° counterclockwiseB. rotate 270° counterclockwise, translate right 8 unitsC. translate up 8 units, reflect over y-axisD. reflect over y-axis, rotate 90° counterclockwise

Answer 1

The only way to check which one is the correct answer is to perform each set of transformations and check which one is the correct one. First, note that the initial position of the smiley face is the third quadrant. So, we will first apply vaguely the transformations to check to which one is the smiley face located in the first quadrant once we are done with the transformations.

So, let us analyze each set of transformations separately.

Option A

After reflexing over the x axis, the smiley face position would be

so, once rotated 270° counterclockwise, the position of the smiley face would be

so option A is not the correct answer

Option B

if we rotate 270° counterclockwise, the smiley face's position would be

and by translating 8 units to the right, it would be

so option B is the correct answer