Which of the following is a logarithmic function?

(5, 11)

Step-by-step explanation:

y = 2x + 1

x + y = 16

Substitute 2x + 1 for y in 'x + y = 16'

x + y = 16

x + (2x + 1) = 16

3x + 1 = 16

Subtract both sides by 1

3x = 15

Divide both sides by 3

x = 5

Now to find y

Since we know what x is, we can use one of the equations and substitute 5 for x. I'll use both to show that you get the same answer.

Second equation:

x + y = 16

5 + y = 16

Subtract both sides by 5

y = 11

First equation:

y = 2x + 1

y = 2(5) + 1

y = 10 + 1

y = 11

The solution would be (5, 11)