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Start by rewriting the given rational function by inspection.
Function: g(x)=- 2/x-1+5
Graph:
Graph of g as a Transformation of the Graph of f(x)= ax: Translation 1 unit right and 5 units up of the graph of f(x)= - 2x.
We will rewrite the function, describe the graph of g as a transformation of the graph of f(x)= ax, and draw the graph of g.
Write as a difference
Write as a sum of fractions
Factor out 5
Cancel out common factors
Simplify quotient
Commutative Property of Addition
We have found an equivalent expression for g. g(x)=5x-7/x-1 ⇔ g(x)=- 2/x-1+5
Let's start by recalling two possible transformations of the function f(x)= ax.
Function | Transformation of the Graph of f(x)= ax |
---|---|
g(x)=a/x- h | Horizontal translation by h units. If h>0, the translation is to the right. If h<0, the translation is to the left. |
g(x)=a/x+ k | Vertical translation by k units. If k>0, the translation is up. If k<0, the translation is down. |
Now consider the obtained equation. g(x)=- 2/x- 1+ 5 We can see that a= - 2, h= 1, and k= 5. Therefore, the graph of g is a translation 1 unit right and 5 units up of the graph of f(x)= - 2x. We will use this information to draw the graph.