Solving the differential equation

$\frac{dy}{dt}-3y=2t$

with an initial condition $y(0)=1$ and a time step $t=0\mathrm{.}1$ using Euler's method yields a numerical value for $y(0\mathrm{.}1)$ of

$1\mathrm{.}10$

$1\mathrm{.}55$

$125$

$1\mathrm{.}30$

$1\mathrm{.}15$