HEL indentify one characteristic of exponential decay

A more intuitive characteristic of exponential decay for many people is the time required for the decaying quantity to fall to one half of its initial value. This time is called the half-life, and often denoted by the symbol t1/2. The half-life can be written in terms of the decay constant, or the mean lifetime.

Step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

she will travel a distance in the range of 3 - 11 miles