Answer:
I believe that the answer is k=4.
Step-by-step explanation:
Because in order for a new function to be narrower than its parent function, the absolute value of k must be greater than 1 (k > 1), and for a new function to open in the same direction as its parent function, it must be positive, that leaves with only four as our answer.
Hello there!
Perpendicular lines have slopes that are opposite reciprocals. It means that if we have 8, then its opposite reciprocal would be -1/8.
Hope this helps!
~Just an emotional teen who listens to her favorite song "Try Everything"

The answer must be 1.2857142857