A scuba divers dove 950 feet below the surface in 19 minutes what integer represents the average rate of change for this dive?

It is 50 feet per minute

"950 feet in 19 minutes" can be expressed as the rate (950/19) (ft/min), and is negative because the diver is descending (going downward).

Simplifying, - 950/19 (ft/min) = - 50 (ft/min)