Answer:
Principal
Step-by-step explanation:
She needs to know how much money she's putting in to be able to calculate interest.
0+0=0
lololo.............
It's C.
The red curve pass through the point (0, 1) and also y = 2 when x = 1 , so this is y = 2^x. The inverse is the reflection of f(x) in x = y so the blue curve is y = log2 x.