The height , in meters, of a projectile launched vertically is modeled by the function , where is the time in seconds after it is launched. If is graphed in the -plane, what is the real-life meaning of the negative -intercept of the graph?
The time the projectile was launched
The height of the projectile before it was launched
The time before launch when the projectile would have been at ground level if its trajectory was extended backward
The minimum height the projectile reached
