Algebra-1

Question Analysis
This question tests the student's ability to find the y-intercept of a quadratic function in its vertex form. The y-intercept is the value of the function when .

Key Concept Explanation
For a quadratic function in the vertex form , the y-intercept can be found by substituting into the function and simplifying the expression.

Step-by-step Solution
1. Identify the vertex form of the quadratic function:
2. Set

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