Concept explainers
Find the vertex, focus and directrix of the parabola and sketch it

Answer to Problem 49E
Explanation of Solution
Given:
The equation of the parabola is
The equation of the parabola is
Simplifying and converting into standard form, we get
The standard form of the equation of the parabola is as follows:
And it has horizontal axis.
Comparing this with equation (1), we get
Thus, the vertex of the parabola is at (1,1).
Also,
Again, since the value of
As, the directrix is given as,
Thus, the directrix of the parabola is
Since, the parabola opens upward, the focus is located at
Thus, the focus is
The graph of the given parabola
Chapter 10 Solutions
EBK PRECALCULUS W/LIMITS
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