Answer:
The answer is "3".
Explanation:
If the compression factor of 3 is modified, the k value is 3 For a function f(x) the horizontal extending or compression is provided by g = f (bx)
Here b is constant. Where b is constant.
If b> 0, the function graph is condensed. The fact that perhaps the function is transformed by an encoding factor of 3 is given in the question.
![\to f(x)=7^x+1\\\\\to g=f(b(x))](https://img.qammunity.org/2022/formulas/mathematics/college/16e5r00s7ne89441assknoccenl6eopgd0.png)