The last answer choice is the correct one. The common ratio here is 0.7, which is between 0 and 1, an important criterion for recognizing an exponential decal function. Every time x increases, f(x) will decrease.

4 0

3 years ago

Please help me that’s would be great and I promise to mark brainlest!!

defon

Option A is correct.

If we evaluate the function at $x=0$ , i.e. at the beginning, we have

$f(0)=75 \cdot 2^0 = 75 \cdot 1 = 75$

with each minute, you multiply the current number of cell by 2, so they double every minute.

Option B is incorrect, because if the number of cells increases by 2 every minute, the function would be

$f(x) = 75 + 2k$

Option C is incorrect, because after one minute (i.e. when x=1) we have

$f(1) = 75\cdot 2^1 = 75 \cdot 2 = 150$

cells, so 75 is not the number of cells after one minute

Option D is incorrect in both the initial value and the behaviour of the function

6 0

3 years ago