2 {\displaystyle {\sqrt {2}}}
2 5 = 2 ⋅ 20 5 ⋅ 20 = 40 100 {\displaystyle {\frac {2}{5}}={\frac {2\cdot 20}{5\cdot 20}}={\frac {40}{100}}}
g ( x ) = 1 2 x + 17 {\displaystyle g(x)={\frac {1}{2}}x+17}
