The temperature dropped by 7.f each hour from 5: 00 am to 9: 00 am. what was the beginning temperature at 5: 00 am if the temperature at 9: 00 am was -10.f

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)