Question

What is k(-4) equal to? K:m => 7+m^2 K(-4) = [1]

Answer 1

The function is defined as

$k:m\mapsto m^2+7$

This means that, taken an input m, the output is the input squared, plus 7.

So, if we take the input -4, we square it to get 16, and we add 7 to get 23.