For the data in each table tell whether y varies directly with x if it does write an equation for the direct variation x|y
-3|-7.5
-1|2.5
2|-5
5|-12.5
slope = (2.5 - -7.5) / (-1 - -3) = 9.5/2
slope = (-5 - 2.5) / (2 - -1) = -7.5 /3
up then down, no way