????????????? "ern" ?????????? maebee yu tri tu impli sumwon get PpAED ????
maebee yu tri tu hint it be s strate line ??????????
yu hav 2 points & want a strate line thru it ????????
delta sale=1000-500=500$
delta "ern"=480-390=90$
slope=dy/dx=90/500=0.18
projekt bak tu sell=0 & yu get pae=300$ wen sell=0
thus, ae=300$+0.18*sell