I can tell you copied the last sentence. I know what standard form is though so...
Standard form is Ax+By=y intercept
The slope is -2
so our first equation is 2x+y=the y intercept
The y intercept in this equation is -3
So the equation is 2x+y=-3
Yay!
Edit:
NVM ON MY NVM IM WRONG AS ALWAYS
I'M BLIND LOL