Algebra-1

Question Analysis
This question tests the student's ability to find the range of a quadratic function by identifying the vertex and the direction it opens.

Key Concept Explanation
The range of a quadratic function depends on the vertex's y-coordinate (k) and the sign of the coefficient a. If a > 0, the parabola opens upward, and the range is .

Step-by-step Solution
1. Identify the coefficients: , ,
2. Calculate the x-coordinate of the vertex: