Hello, Veronica1999!

A bird flies linearly, according to the equation: .

Assume that the Sun is directly overhead, making the Sun's rays perpendicular

to the xy-plane, which represents the ground.

The bird's shadow is said to be projected perpendicularly onto the level ground.

Find an equation that describes the motion of the shadow.

I got: . . Correct!

We have: .

From [1]: .

From [2]: .

Equate [4] and [5]: .