Which transformation carries the parallelogram onto itself?
a reflectioelmacross the line y = 3
a reflection across the line y=1
a rotation of 180 degrees about the origin
a rotation of 180 degrees about the point (1,3)

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth