Dystopie : grammaire anglaise et modélisation linéaire

Choose the correct words to complete this sentence about the literary genre of dystopian fiction: 'Authors (use / uses) science fiction to (critique / criticizing) societal trends.' Then, consider a study where the number of dystopian themes identified in a novel is represented by $x$ and the author's social message clarity by $y$. The relationship is defined by the function $y = 3x + 2$. If an author includes $x = 4$ themes in their work, what is the value of $y$?