Exponential Functions · Exercise 35

Determine whether the table could represent a function that is linear, exponential, or neither. If it appears to be exponential, find a function that passes through the points.

$$\begin{array}{ccccc}x& \text{1}& \text{2}& \text{3}& \text{4}\\ f\left(x\right)& \text{10}& \text{20}& \text{40}& \text{80}\end{array}$$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Algebra and Trigonometry 2e · §6.1 Exponential Functions · Exercise 35