due at 3: 45 an airplane has begun its descent for a landing. when the airplane is 150 miles west of its destination, its altitude is 25,000 feet. when the airplane is 90 miles west of its destination, its altitude is 19,000 feet. if the airplane's descent is modeled by a linear function, where will the airplane be in relation to the runway when it hits ground level?

If we assume the model is linear, keep in mind that, when the plane hits the ground, the altitude is 0, because it just hit the ground, is not above it anymore.







so.. .the westward location is -100 feet.... now, when the westward location is 0, it means the airplane arrived at its westward destination already.

Once it reached 0, is there, if it keeps on going to negative values, when it hits the runway, it is already 100 feet into it by the time the wheels touch it.