Which function is increasing a f (x) = (1/4) bf (x) = 0.4) x c. f (x) = 4x d. f (x) = (1/2) x

We are going to rewrite the functions correctly:

f (x) = (1/4)

f (x) = (0.4) ^ x

f (x) = 4 ^ x

f (x) = (1/2) ^ x

We observe that we have functions of the form:

f (x) = A (b) ^ x

When

b> 1 The function grows

b <1 Function decreases

Therefore, the function that is growing is:

f (x) = 4 ^ x

Answer:

The function that is increasing is:

f (x) = 4 ^ x

option C)