To identify the parent function for the given graph, write the equation and describe the transformation for the graph.
Answer to Problem 34E
The equation is:
The parent function is:
Explanation of Solution
Graph:
The given graph is:
After looking at the graph the following can be concluded:
The given graph is for 1yy13
x- intercept: The graph intersects the x- axis at about
y- intercept: The graph intersects the y- axis at about
Equation:
To write the equation of this graph the standard form is used which is:
Such that a is the y- intercept.
Substituting the value of a into the equation (i),
Hence, the obtained equation is:
Verification:
Using the graphing tool the equation is plotted:
When the plotted graph and given graph are compared it is found that both the graphs are equal, which means that the obtained equation is correct.
Parent function:
The obtained equation is:
Therefore, the function is:
Hence, the parent function is:
Transformation Interpretation:
The function is:
Calculation for graph:
Consider
Values of x | Values of f (x ) |
0 | 1 |
1 | 0 |
-1 | 2 |
2 | -7 |
-2 | 9 |
Using the above table the graph can be plotted.
Calculation for graph:
Consider
Values of x | Values of g (x ) |
0 | 0 |
1 | 1 |
2 | 8 |
3 | 27 |
4 | 64 |
Using the above table the graph can be plotted.
Graph:
Interpretation:
Hence, comparing
The parent function is
Conclusion:
The obtained equation is
Chapter 1 Solutions
Precalculus with Limits: A Graphing Approach
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