Concept explainers
For Exercises 2–3,
a. Write the equation in vertex form:
b. Determine whether the parabola opens upward or downward.
c. Identify the vertex.
d. Identify the x -intercept.
e. Identify the y -intercept.
f. Sketch the function.
g. Determine the axis of symmetry.
h. Determine the minimum or maximum value of the function.
i. State the domain and range.
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