
Concept explainers
To match: the equation with the graph.

Answer to Problem 9E
Explanation of Solution
Given information:
The equation is
First write the equation in a standard form of parabola,
Comparing the standard form of the parabola to the general equation,
By comparing the equations it can be observed that,
Directrix: the directrix of parabola is given by
Since
So the directrix of the parabola is
Focus: the focus of parabola is given as
Since
Thus, the focus of parabola is
Vertices :
Since the
Use the above information together with some additional values which is show in table below
To sketch the graph,
x | y |
1 | 2.82 |
2 | 4 |
3 | 4.89 |
4 | 5.65 |
The graph is obtained as:
Chapter 11 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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