**Answer:**

**The answer is C.**

**There is a horizontal line test but the question asks to use the vertical line test. Using the horizontal line test you would get that the function is not one to one but using the vertical line test you would get its one to one.**

I think its answer B, but im not 100% sure, so im sorry if its wrong

**Answer:**

3960

**Step-by-step explanation:**

i dont know

my sister helped me hope i get it right

Last step...

8x = 80 ---divide both sides by 8 ---division property

x = 80/8

x = 10

**Answer:**

<em>Exponential decay function</em>

**Step-by-step explanation:**

The given table represents some function between x and y:

x - 3 - 6 - 9 - 12

y - 2401 - 343 - 49 - 7

We are required to find if it's exponential growth, decay, or neither.

An exponential function is identified because each term is calculated as the previous term **multiplied by **a constant factor.

The linear relationship is identified because each term is calculated as the previous term **plus **a constant difference.

Note the values of x grow three by three and the values of y are constantly divided by 7 or multiplied by 1/7.

There is a common factor and not a common difference. Since the common factor is less than 1, the function is exponential decay.

Bonus: The exponential function is: