Question

The table below shows some input and output values for a function named F(n). Which of the following equations describes F(n)?

n
F(n)
1 9
2 19
5 49
8 79
10 99
20 199
A. F(n) = n + 8
B. F(n) = 10n - 1
C. F(n) = 10n + 9

Answer 1

It looks like each increase of 1 for n, results in an increase of 10 for F(n)
and F(1) = 9 from the table

F(n) = 10n - 1

Is the one that works with both those requirements

Answer 2

f(1) = 10(1) - 1 = 9
f(2) = 10*2 - 1 = 19
.
.
.

Answer 3

each output, it one less than 10 times the input