Determine whether y varies directly with x if so find the constant of variation of k write the equation x= 5,10,15,20 y=25,25,70,90

Which geometric principle is used to justify the construction below?

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.

4percent of a number is what fraction of that number? ? i really need asap