Question

Suppose y varies directly as x. if y = 3 when x = 15, find when y = 5.​

Answer 1

Answer:

              X = -9

Step-by-step explanation:

y = k X for some fixed number constant k.

 

-5 = k (15)

 

k = -5/15 = -1/3

 

So y = (-1/3)X

 

When y = 3 ---> 3 = (-1/3)X

                        X = -9