Graph y=-4/3x+8 pls helpp

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

∆red ≅ ∆ by rule will give brainiest if possible

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?