[tex]\begin{gathered} \text{ if the input is 2, thus the output is } \\ y=2\cdot2-3=1 \\ \\ \text{and if the output is 5, then the input is } \\ 5=2x-3 \\ 5+3=2x \\ 8=2x \\ x=\frac{8}{2} \\ x=4 \\ \\ \text{ thus the table is the third one} \end{gathered}[/tex]
