Question

help....
x varies directly as y, and x = 153 when y = 9. Find x when y = 13.


106
157
221

Answer 1

Since, x varies directly as y, then for some k, x = ky.

We are given x = 153, when y = 9, so let's plug those in and see what k is.

153 = 9k
17 = k

So, our equation is x = 17y

Now we can find the answer when y = 13....

x = 17(13)
x = 221

Answer 2

ok thankx.....

Answer 3

My Pleasure.