Respuesta :

jhonyy9
so than y varies directly with x this mean y = x 
so than y=400 when  x=r andy = r when  x = 4 

y=400 ------ x=r
y =r ------ x=4

bc. we know that y varies directly as x so y=nx so r= 4/400 = 1/100 

the numeric constant is r = 1/100

Answer:

It is not 100

Step-by-step explanation: