What effect on the takeoff run can be expected on Rwy 11R at Tucson Intl due to the runway slope?

The correct answer is that the takeoff run will be lengthened by the 0.7 percent upslope of the runway. When a runway has an upslope, it means that the aircraft needs to exert more power to climb against the incline during its takeoff. This requires a longer takeoff distance because the aircraft must achieve a greater amount of lift as it ascends, thereby requiring a longer run to reach the necessary speed for takeoff. The effect of the slope on the takeoff run is significant; an upslope makes it harder for the aircraft to accelerate and generate lift, ultimately extending the required distance for takeoff.

In contrast, a displaced threshold affects the available runway length for takeoff, which means it would lead to a limited takeoff distance rather than a notable extension. A slope in the opposite direction (downward) could shorten the takeoff distance, but in this scenario, the upslope clearly necessitates a longer takeoff run.