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0
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Which graph represents the exponential functionđť‘“(đť‘Ą) = 2(2)x-4 ?

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Guest Dec 1, 2017

#2
+5576
+1

Maybe it is supposed to be

f(x)  =  2(2)x - 4        ???

If so...

f(0)   =   2(2)0 - 4   =   2(1) - 4   =   2 - 4   =   -2     So the graph passes through  (0, -2) .

f(1)   =   2(2)1 - 4   =   2(2) - 4   =   4 - 4   =   0     So the graph passes through  (1, 0) .

The first graph passes through  (0, -2)  and  (1, 0)  , so it looks right.

Here's a graph of  y = 2(2)x - 4

hectictar  Dec 1, 2017
Sort:

#1
+79894
+1

None of them

Here is the graph  :  https://www.desmos.com/calculator/6t93qupx9m

Are you sure that you have the correct function ???

CPhill  Dec 1, 2017
#2
+5576
+1

Maybe it is supposed to be

f(x)  =  2(2)x - 4        ???

If so...

f(0)   =   2(2)0 - 4   =   2(1) - 4   =   2 - 4   =   -2     So the graph passes through  (0, -2) .

f(1)   =   2(2)1 - 4   =   2(2) - 4   =   4 - 4   =   0     So the graph passes through  (1, 0) .

The first graph passes through  (0, -2)  and  (1, 0)  , so it looks right.

Here's a graph of  y = 2(2)x - 4

hectictar  Dec 1, 2017
#3
+79894
+1

Nice detective work, hectictar.....!!!!

CPhill  Dec 1, 2017

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