Since a slope differe, this is not linear relationship. Simply, if you connect all points on the graph, they will not lie on the same line. Two next graphs represent the linear relationships, so they represent the linear relationship.
830$ there are 52 weeks in a year. 52 times 15 is 780. 780 plus 50 is 830
The equation of a circle is defined by: (x - h)² + (y - k)² = r² where
(h,k) represents the center of your circle and r = the radius
So (x - 2)² + (y + 8)² = 121 is your equation
