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hsedward hsedward
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Posts: 47
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3 years ago
accurately sketch the graph of the equation y= 4/x+1      + 5 using transformation (includes steps such as identifying the parameters, describing parameters,mapping notation, image points
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wrote...
Educator
3 years ago
All reciprocal functions follow this pattern:

\(y=a\ \frac{1}{k\left(x-d\right)}+c\)

As does your equation: \(y=\frac{4}{x+1}+5\)

Notice that:

a=4 > vertical compression by a factor of 4
d=+1 > horizontal shift to the left by 1
c=5 > vertical shift up 2 units

When it comes to graphing transformations, start by graphing y=1/x. You should know how to graph it using a table of values:

xy
-2-0.5
-1-1
0DNE
11
20.5

Some key anchor points are (-1,-1) and (1,1).

Next apply the 'a' value of 4 by multiplying only the y-outputs by 4:

x4[y]
-2-2
-1-4
0DNE
14
22

Next, we apply the 'd' value of +1. This means we'll subtract 1 from every x-value, while leaving the y-outputs the same:

x-14[y]
-3-2
-2-4
-1DNE
04
12

Finally, we apply the 'c' value of +5 to the y's only:

x4[y]+5
-33
-21
-1DNE
09
17

By plotting these key points successively, you get your transformation.

Please review the following video:

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