To derive f(x) = -67x, we can use the Power Rule.
In the given term, our n = 1 since x¹ = x. So, following the power rule, we will multiply the exponent 1 to the constant term -67, then subtract 1 from the exponent 1, hence x¹ will become x⁰.
Then, simplify.
Therefore, the first derivative of f(x) = -67x is -67.