Are the diagonals of the parallelogram perpendicular? A(2,2) B(4,-2) C(-1,-3) D(-7,3)
1) Yes
2) No

Aregression was run to determine if there is a relationship between hours of tv watched per day (x) and number of situps a person can do (y). the results of the regression were: y=ax+b a=-0.662 b=30.418 r2=0.703921 r=-0.839

How to do this , and can some one explain

How do newtons third law of motion demonstrates on a rollar coster