Elmo need help, please help elmo
Select all the correct answers.
Emma throws an object upward from a hill that is 64 feet high. The object has an initial velocity of 48 feet per second. The function y = -16x2 + 48x + 64 represents the height of the object, y, in terms of the time elapsed after the object is thrown, x.

Which statements about this function are true?

The function is a linear function.
The function is a nonlinear function.
The function has a constant rate of change.
The function does not have a constant rate of change.
The function is a decreasing function.