Answer :
Answer: y ≤ 1
Step-by-step explanation:
Range refers to the y-values.
y = -x² + 1 is an "upside down" parabola with the vertex at (0, 1).
The highest y-value is 1. The lowest y-value is negative infinity.
This can be written as: y ≤ 1 or (-∞, 1]