Which of the following options results in a graph that shows exponential growth?

f(x) = 0.4(0.2)x
f(x) = 4(0.98)x
f(x) = 0.7(5)x
f(x) = 5(4)−x

Question

Which of the following options results in a graph that shows exponential growth?

 f(x) = 0.4(0.2)x
 f(x) = 4(0.98)x
 f(x) = 0.7(5)x
 f(x) = 5(4)−x

anonymous · Answer

Look at the number inside the parenthesis; if it is greater than 1, then that's an exponential growth.

anonymous · Answer

Examples: 
$\huge f(x)=100(2)^x$
$\huge f(x)=0.5(9)^x$

The numbers in the parentheses are 2 and 9. They are greater than 1, so they both show an exponential growth.

anonymous · Answer

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