Could someone explain how this (c) was the correct answer? you

For table C, there is no x-value that has more than one y-value.

Step-by-step explanation:

A function must not have the same first coordinate which is the x-coordinate having more than y-values. So that it can pass the vertical line test.

For table A, we have .

Since there is at least an x-value having more than one y-value, it ceases to be a function.

For table B, we have .

Since there is at least an x-value having more than one y-value, it ceases to be a function.

For table C, there is no x-value that has more than one y-value.

For table D, we have and

Since there is at least an x-value having more than one y-value, it ceases to be a function.

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: