
Concept explainers
To graph: Graph the equations y=x2,y=(x−2)2,y=(x−4)2 and y=(x+2)2 . Then observe the pattern from the graph drawn. Predict the graph of y=(x+4)2 and y=
(x−5)2

Answer to Problem 61AYU
Solution:
Explanation of Solution
To Sketch: Graph the following equation with the graphing utility:
1. y=x2
2. y=(x−2)2
3. y=(x−4)2
4. y=(x+2)2
Interpretation:
The equation y=x2 is a parabola open upwards with the vertex point (0,0) . Adding the value 2 with x gives the shifted parabola with the vertex point (-2,0) . And subtracting the values 2 and 4 gives the shifted parabola with the vertex point (2,0) and (4,0) .
Therefore, the equation y=(x+4)2 gives the shifted parabola with the vertex point (-4,0) and the equation y=(x−5)2 gives the shifted parabola with the vertex point (5,0) .
That is, the graph must be like follows:
Chapter 2 Solutions
Precalculus Enhanced with Graphing Utilities
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