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Start by rewriting the given rational function by inspection.
Function: g(x)=- 79/x+10+7
Graph:
Graph of g as a Transformation of the Graph of f(x)= ax: Translation 10 units left and 7 units up of the graph of f(x)= - 79x.
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 7
Cancel out common factors
Simplify quotient
Commutative Property of Addition
We have found an equivalent expression for g. g(x)=7x-9/x+10 ⇔ g(x)=- 79/x+10+7
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)=- 79/x+10+7 ⇕ g(x)=- 79/x-( - 10)+ 7 We can see that a= - 79, h= - 10, and k= 7. Therefore, the graph of g is a translation 10 units left and 7 units up of the graph of f(x)= - 79x. We will use this information to draw the graph.