Find the coordinates of the point of intersection y=2x+3 y=-1/2x-2

Which ratio is equivalent to 10: 85

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

Which equation matches the graph shown ?