HELP PLS ILL MARK AS BRAINIEST

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

A50% increase followed by 33 1/2% decrease