SOLUTION: x -1 0 1 f(x) 1/8 1/2 2 The table above shows some values for the function f.If f(x)=ka^x for some constants k and a,what is the val

Algebra ->  Functions -> SOLUTION: x -1 0 1 f(x) 1/8 1/2 2 The table above shows some values for the function f.If f(x)=ka^x for some constants k and a,what is the val      Log On


   

Question 392620: x -1 0 1

f(x) 1/8 1/2 2

The table above shows some values for the function f.If f(x)=ka^x for some constants k and a,what is the value of a?
A)1/2 B) 1/4 C) 2 D) 4 E) 16


Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

x          -1       0       1  

f(x)       1/8      1/2     2

f(x) = ka^x        |Using ordered pair (0,1/2)

1/2 = k a^0

1/2 = k

f(x) = (1/2)a^x    |using ordered pair (1,2)

 2 = (1/2)a^1

 4 = a