What does it mean by "superimpose the regression line on the scatter plot" ? ?

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Which statement justifies why angle ebc measures 90?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have