Question

what is the range of this quadratic function?

options:
{y|y ≥ -10}
{y|y ≤ 2}
{y|-1 ≤ y ≤ 1}
all real numbers

Explanation:

Step1: Identify vertex direction/value

The parabola opens downward, vertex at $y=2$.

Step2: Determine possible y-values

All y-values are ≤ vertex y-value.

Answer:

$\{y \mid y \leq 2\}$