Whats 1 + 77 just for you guys to get points :)

step-by-step explanation:

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval