Which activation function turns the optimization problem discussed in the image attached into a linear regression problem?

Perceptron and Neural Networks Perceptron o Simplified perceptron as a simple neural network by Rosenblatt (1958) and Minsky and Seymour (1969), so-called artificial neural networks Weight Bias Optimization problem: what are the optimum values of all Wn and By such X = M X; Wit Bi minimize (maximize) error (accuracy) measurement of Yestimated versus Yreal? Y = f(x) =f M X; Wi + Bi Fitting one or very few datapoints i=1 6